diff --git a/app/pages/bookings/index.vue b/app/pages/bookings/index.vue
index 3249b09..02d1928 100644
--- a/app/pages/bookings/index.vue
+++ b/app/pages/bookings/index.vue
@@ -302,6 +302,15 @@
                   icon="i-lucide-receipt"
                   size="sm"
                 />
+                <UButton
+                  label="Edit"
+                  color="neutral"
+                  variant="outline"
+                  icon="i-lucide-pencil-line"
+                  size="sm"
+                  :disabled="!bookingConfig"
+                  @click="openBookingEditor(row.original)"
+                />
                 <UButton
                   label="Transfer"
                   color="neutral"
@@ -322,12 +331,158 @@
                   :disabled="cancellingBookingId !== null && cancellingBookingId !== row.original.id"
                   @click="cancelBookingConfirmation(row.original)"
                 />
+                <UButton
+                  label="Delete"
+                  color="error"
+                  variant="outline"
+                  icon="i-lucide-trash-2"
+                  size="sm"
+                  :loading="deletingBookingId === row.original.id"
+                  :disabled="Boolean(deletingBookingId) && deletingBookingId !== row.original.id"
+                  @click="deleteBooking(row.original)"
+                />
               </div>
             </template>
           </UTable>
         </div>
       </UCard>
 
+      <UModal
+        v-model:open="detailsModalOpen"
+        title="Edit Booking"
+        description="Update guest details, ticket selection, quantity, and internal remark."
+        :dismissible="!savingDetails"
+        :close="!savingDetails"
+        :content="{ class: 'sm:max-w-2xl' }"
+      >
+        <template #body>
+          <UForm
+            id="bookingDetailsForm"
+            :state="detailsForm"
+            :validate="validateBookingDetails"
+            class="space-y-4"
+            @submit="saveBookingDetails"
+          >
+            <div v-if="detailsBooking" class="rounded-lg border border-default bg-muted/20 px-3 py-2">
+              <p class="text-sm font-medium text-highlighted">
+                {{ detailsBooking.customerName }}
+              </p>
+              <p class="text-xs text-muted">
+                Current: {{ ticketLabel(detailsBooking) }} - {{ detailsBooking.seatCount }} seats
+              </p>
+            </div>
+
+            <div class="grid gap-4 sm:grid-cols-2">
+              <UFormField name="customerName" label="Guest / Organizer" required>
+                <UInput
+                  v-model="detailsForm.customerName"
+                  size="lg"
+                  class="w-full"
+                  placeholder="e.g. John Doe"
+                />
+              </UFormField>
+
+              <UFormField name="customerPhone" label="Phone Number" required>
+                <UInput
+                  v-model="detailsForm.customerPhone"
+                  size="lg"
+                  type="tel"
+                  class="w-full"
+                  placeholder="e.g. +60123456789"
+                />
+              </UFormField>
+            </div>
+
+            <div class="grid gap-4 sm:grid-cols-2">
+              <UFormField name="bookingMode" label="Booking Mode" required>
+                <USelect
+                  v-model="detailsForm.bookingMode"
+                  :items="bookingModeItems"
+                  :disabled="savingDetails || !bookingModeItems.length"
+                  size="lg"
+                  class="w-full"
+                />
+              </UFormField>
+
+              <UFormField name="quantity" :label="selectedDetailsBookingMode?.quantityLabel || 'Quantity'" required>
+                <UInputNumber
+                  v-model="detailsForm.quantity"
+                  :min="1"
+                  :step="1"
+                  :disabled="savingDetails"
+                  size="lg"
+                  class="w-full"
+                />
+              </UFormField>
+            </div>
+
+            <UFormField name="ticketType" label="Ticket Category" required>
+              <URadioGroup
+                v-model="detailsForm.ticketType"
+                orientation="horizontal"
+                variant="card"
+                indicator="hidden"
+                :items="ticketCatalogItems"
+                :disabled="savingDetails || !ticketCatalogItems.length"
+                :ui="{
+                  fieldset: 'grid grid-cols-2 gap-3',
+                  item: 'rounded-lg border border-default bg-default p-3 data-[state=checked]:border-primary data-[state=checked]:bg-primary/5'
+                }"
+              />
+            </UFormField>
+
+            <div class="rounded-lg border border-default bg-muted/30 px-4 py-3">
+              <div class="flex items-center justify-between gap-4">
+                <span class="text-sm font-medium text-muted">Updated total</span>
+                <div class="text-right">
+                  <div class="text-lg font-semibold text-highlighted">
+                    {{ detailsTotalFormatted }}
+                  </div>
+                  <div class="text-xs text-muted">
+                    {{ detailsSeatCount }} seats
+                  </div>
+                </div>
+              </div>
+            </div>
+
+            <UFormField name="remark" label="Remark">
+              <UTextarea
+                v-model="detailsForm.remark"
+                :rows="4"
+                :maxlength="remarkLimit"
+                autoresize
+                class="w-full"
+                placeholder="Internal handling note"
+              />
+              <template #help>
+                {{ detailsForm.remark.length }}/{{ remarkLimit }}
+              </template>
+            </UFormField>
+          </UForm>
+        </template>
+
+        <template #footer>
+          <div class="flex w-full flex-col-reverse gap-2 sm:flex-row sm:justify-end">
+            <UButton
+              label="Cancel"
+              color="neutral"
+              variant="ghost"
+              class="justify-center"
+              :disabled="savingDetails"
+              @click="closeBookingEditor"
+            />
+            <UButton
+              type="submit"
+              form="bookingDetailsForm"
+              label="Save Booking"
+              icon="i-lucide-save"
+              class="justify-center"
+              :loading="savingDetails"
+            />
+          </div>
+        </template>
+      </UModal>
+
       <UModal
         v-model:open="remarkModalOpen"
         title="Booking Remark"
@@ -434,12 +589,33 @@
 </template>
 
 <script lang="ts" setup>
+import type { FormError, FormSubmitEvent } from '@nuxt/ui'
+
 import type { PublicContact } from '~~/shared/auth'
-import type { BookingCapacitySettings, BookingInventorySummary, CancelBookingConfirmationResponse, PublicBooking, TransferBookingPicResponse } from '~~/shared/booking'
+import type {
+  BookingCapacitySettings,
+  BookingInventorySummary,
+  BookingModeOption,
+  BookingMode,
+  CancelBookingConfirmationResponse,
+  DeleteBookingResponse,
+  PublicBooking,
+  PublicBookingConfig,
+  TicketCatalogItem,
+  TicketType,
+  TransferBookingPicResponse,
+  UpdateBookingDetailsResponse
+} from '~~/shared/booking'
 
+import {
+  DEFAULT_PHONE_COUNTRY_CODE,
+  isValidPhoneNumber,
+  normalizePhoneNumber
+} from '~~/shared/auth'
 import {
   formatBookingCurrency,
-  getBookingStatusLabel
+  getBookingStatusLabel,
+  getSeatCount
 } from '~~/shared/booking'
 
 import { getErrorMessage } from '../../utils/errors'
@@ -454,15 +630,21 @@ const apiClient = useApiClient()
 const auth = useAuth()
 
 const bookings = ref<PublicBooking[]>([])
+const bookingConfig = ref<PublicBookingConfig | null>(null)
 const contacts = ref<PublicContact[]>([])
 const loadingBookings = ref(false)
+const loadingBookingConfig = ref(false)
 const loadingContacts = ref(false)
 const savingCapacity = ref(false)
+const savingDetails = ref(false)
 const savingRemark = ref(false)
 const savingTransfer = ref(false)
 const cancellingBookingId = ref<string | null>(null)
+const deletingBookingId = ref<string | null>(null)
+const detailsModalOpen = ref(false)
 const remarkModalOpen = ref(false)
 const transferModalOpen = ref(false)
+const detailsBooking = ref<PublicBooking | null>(null)
 const editingBooking = ref<PublicBooking | null>(null)
 const transferringBooking = ref<PublicBooking | null>(null)
 const searchQuery = ref('')
@@ -479,6 +661,14 @@ const summary = reactive<BookingInventorySummary>({
 const capacityForm = reactive({
   totalSeats: ''
 })
+const detailsForm = reactive({
+  customerName: '',
+  customerPhone: DEFAULT_PHONE_COUNTRY_CODE,
+  bookingMode: '' as BookingMode,
+  quantity: 1,
+  ticketType: '' as TicketType,
+  remark: ''
+})
 const remarkForm = reactive({
   remark: ''
 })
@@ -487,6 +677,32 @@ const transferForm = reactive({
 })
 const remarkLimit = 1000
 
+const bookingModeItems = computed(() => {
+  return bookingConfig.value?.bookingModes.map((mode: BookingModeOption) => ({
+    label: mode.label,
+    value: mode.value
+  })) || []
+})
+
+const ticketCatalogItems = computed(() => {
+  return bookingConfig.value?.ticketCatalog.map((ticket: TicketCatalogItem) => ({
+    label: ticket.label,
+    value: ticket.value,
+    description: ticket.description
+  })) || []
+})
+
+const selectedDetailsBookingMode = computed(() => {
+  return bookingConfig.value?.bookingModes.find((mode) => mode.value === detailsForm.bookingMode) ?? null
+})
+
+const selectedDetailsTicket = computed(() => {
+  return bookingConfig.value?.ticketCatalog.find((ticket) => ticket.value === detailsForm.ticketType) ?? null
+})
+
+const detailsSeatCount = computed(() => getSeatCount(selectedDetailsBookingMode.value, detailsForm.quantity))
+const detailsTotalFormatted = computed(() => formatBookingCurrency(detailsSeatCount.value * (selectedDetailsTicket.value?.price ?? 0)))
+
 const columns = [
   { accessorKey: 'customerName', header: 'Guest' },
   { accessorKey: 'quantity', header: 'Booking' },
@@ -560,6 +776,7 @@ const transferPersonInChargeItems = computed(() => {
 })
 
 await Promise.all([
+  refreshBookingConfig(),
   refreshBookings(),
   refreshContacts()
 ])
@@ -581,6 +798,82 @@ function receiptPath(booking: PublicBooking) {
   return `/receipt/${booking.receiptToken}`
 }
 
+function openBookingEditor(booking: PublicBooking) {
+  detailsBooking.value = booking
+  detailsForm.customerName = booking.customerName
+  detailsForm.customerPhone = booking.customerPhone
+  detailsForm.bookingMode = booking.bookingMode
+  detailsForm.quantity = booking.quantity
+  detailsForm.ticketType = booking.ticketType
+  detailsForm.remark = booking.remark || ''
+  detailsModalOpen.value = true
+}
+
+function closeBookingEditor() {
+  if (savingDetails.value) {
+    return
+  }
+
+  detailsModalOpen.value = false
+  detailsBooking.value = null
+  detailsForm.customerName = ''
+  detailsForm.customerPhone = DEFAULT_PHONE_COUNTRY_CODE
+  detailsForm.bookingMode = ''
+  detailsForm.quantity = 1
+  detailsForm.ticketType = ''
+  detailsForm.remark = ''
+}
+
+function validateBookingDetails(state: typeof detailsForm): FormError[] {
+  const errors: FormError[] = []
+
+  if (!state.customerName.trim()) {
+    errors.push({ name: 'customerName', message: 'Please enter the guest or organizer name.' })
+  }
+
+  if (!state.customerPhone.trim()) {
+    errors.push({ name: 'customerPhone', message: 'Please enter a contact number.' })
+  } else if (!isValidPhoneNumber(state.customerPhone.trim())) {
+    errors.push({ name: 'customerPhone', message: 'Use a valid phone number with country code, e.g. +60123456789.' })
+  }
+
+  if (state.quantity < 1) {
+    errors.push({ name: 'quantity', message: 'Quantity must be at least 1.' })
+  }
+
+  if (!selectedDetailsBookingMode.value) {
+    errors.push({ name: 'bookingMode', message: 'Please select a booking mode.' })
+  }
+
+  if (!selectedDetailsTicket.value) {
+    errors.push({ name: 'ticketType', message: 'Please select a ticket category.' })
+  }
+
+  return errors
+}
+
+async function refreshBookingConfig() {
+  if (loadingBookingConfig.value) {
+    return
+  }
+
+  loadingBookingConfig.value = true
+
+  try {
+    const response = await apiClient<PublicBookingConfig>('/api/public/booking-config')
+    bookingConfig.value = response
+  } catch (error: any) {
+    toast.add({
+      title: 'Unable to load booking settings',
+      description: getErrorMessage(error, 'The booking editor could not load the active event settings.'),
+      color: 'error',
+      icon: 'i-lucide-circle-alert'
+    })
+  } finally {
+    loadingBookingConfig.value = false
+  }
+}
+
 function formatInventoryNumber(value: number | null) {
   return value === null ? 'Not set' : String(value)
 }
@@ -720,6 +1013,90 @@ async function refreshContacts() {
   }
 }
 
+async function saveBookingDetails(event: FormSubmitEvent<typeof detailsForm>) {
+  const booking = detailsBooking.value
+
+  event.preventDefault()
+
+  if (!booking || savingDetails.value) {
+    return
+  }
+
+  savingDetails.value = true
+
+  try {
+    const response = await apiClient<UpdateBookingDetailsResponse>(`/api/bookings/${booking.id}`, {
+      method: 'PATCH',
+      body: {
+        customerName: detailsForm.customerName.trim(),
+        customerPhone: normalizePhoneNumber(detailsForm.customerPhone),
+        bookingMode: detailsForm.bookingMode,
+        quantity: detailsForm.quantity,
+        ticketType: detailsForm.ticketType,
+        remark: detailsForm.remark
+      }
+    })
+
+    replaceBooking(response.booking)
+    await refreshBookings()
+    detailsModalOpen.value = false
+    detailsBooking.value = null
+
+    toast.add({
+      title: 'Booking updated',
+      description: 'The booking details have been saved.',
+      color: 'success',
+      icon: 'i-lucide-check-circle-2'
+    })
+  } catch (error: any) {
+    toast.add({
+      title: 'Booking update failed',
+      description: getErrorMessage(error, 'Unable to save the booking details.'),
+      color: 'error',
+      icon: 'i-lucide-circle-alert'
+    })
+  } finally {
+    savingDetails.value = false
+  }
+}
+
+async function deleteBooking(booking: PublicBooking) {
+  if (deletingBookingId.value) {
+    return
+  }
+
+  if (import.meta.client && !window.confirm(`Delete booking for ${booking.customerName}? It will be archived and removed from the active list.`)) {
+    return
+  }
+
+  deletingBookingId.value = booking.id
+
+  try {
+    const response = await apiClient<DeleteBookingResponse>(`/api/bookings/${booking.id}`, {
+      method: 'DELETE'
+    })
+
+    removeBooking(response.booking.id)
+    await refreshBookings()
+
+    toast.add({
+      title: 'Booking deleted',
+      description: 'The booking has been moved to archived state.',
+      color: 'success',
+      icon: 'i-lucide-trash-2'
+    })
+  } catch (error: any) {
+    toast.add({
+      title: 'Delete failed',
+      description: getErrorMessage(error, 'Unable to delete the booking.'),
+      color: 'error',
+      icon: 'i-lucide-circle-alert'
+    })
+  } finally {
+    deletingBookingId.value = null
+  }
+}
+
 async function saveCapacity(event: Event) {
   event.preventDefault()
 
diff --git a/server/api/bookings/[id].delete.ts b/server/api/bookings/[id].delete.ts
new file mode 100644
index 0000000..8844ff6
--- /dev/null
+++ b/server/api/bookings/[id].delete.ts
@@ -0,0 +1,31 @@
+import type { DeleteBookingResponse } from '~~/shared/booking'
+
+import { requireAuth } from '../../utils/auth'
+import { getBookingById, softDeleteBooking } from '../../utils/booking-repository'
+import { getRequiredRouteParam, httpError } from '../../utils/http'
+
+export default defineEventHandler(async (event): Promise<DeleteBookingResponse> => {
+  const auth = await requireAuth(event)
+  const bookingId = getRequiredRouteParam(event, 'id', 'Booking ID')
+
+  const existingBooking = await getBookingById(bookingId, auth.user.role === 'super_admin'
+    ? undefined
+    : { personInChargeId: auth.user.id })
+
+  if (!existingBooking) {
+    httpError(404, 'Booking not found')
+  }
+
+  const booking = await softDeleteBooking({
+    bookingId,
+    personInChargeId: auth.user.role === 'super_admin' ? undefined : auth.user.id
+  })
+
+  if (!booking) {
+    httpError(404, 'Booking not found')
+  }
+
+  return {
+    booking
+  }
+})
diff --git a/server/api/bookings/[id].patch.ts b/server/api/bookings/[id].patch.ts
new file mode 100644
index 0000000..41f2619
--- /dev/null
+++ b/server/api/bookings/[id].patch.ts
@@ -0,0 +1,88 @@
+import type { UpdateBookingDetailsResponse } from '~~/shared/booking'
+
+import { getSeatCount } from '~~/shared/booking'
+import { requireAuth } from '../../utils/auth'
+import {
+  getBookingById,
+  getBookingInventorySummary,
+  getActiveBookingModeOptionByCode,
+  getActiveTicketCatalogItemByCode,
+  updateBookingDetails
+} from '../../utils/booking-repository'
+import { parseUpdateBookingDetailsInput } from '../../utils/bookings'
+import { getRequiredRouteParam, httpError } from '../../utils/http'
+
+export default defineEventHandler(async (event): Promise<UpdateBookingDetailsResponse> => {
+  const auth = await requireAuth(event)
+  const bookingId = getRequiredRouteParam(event, 'id', 'Booking ID')
+  const body = await readBody<{
+    customerName?: string
+    customerPhone?: string
+    bookingMode?: string | null
+    quantity?: number
+    ticketType?: string
+    remark?: string | null
+  }>(event)
+
+  const existingBooking = await getBookingById(bookingId, auth.user.role === 'super_admin'
+    ? undefined
+    : { personInChargeId: auth.user.id })
+
+  if (!existingBooking) {
+    httpError(404, 'Booking not found')
+  }
+
+  const input = parseUpdateBookingDetailsInput(body)
+  const [bookingMode, ticket] = await Promise.all([
+    getActiveBookingModeOptionByCode(input.bookingMode),
+    getActiveTicketCatalogItemByCode(input.ticketType)
+  ])
+
+  if (!bookingMode) {
+    httpError(400, 'Booking mode is invalid')
+  }
+
+  if (!ticket) {
+    httpError(400, 'Ticket category is invalid')
+  }
+
+  if (bookingMode.eventId !== ticket.eventId || bookingMode.eventId !== existingBooking.event.id) {
+    httpError(400, 'Booking mode and ticket category must belong to the same event')
+  }
+
+  const seatCount = getSeatCount(bookingMode, input.quantity)
+  const totalPrice = seatCount * ticket.price
+  const seatIncrease = Math.max(seatCount - existingBooking.seatCount, 0)
+
+  if (existingBooking.status === 'confirmed' && seatIncrease > 0) {
+    const summary = await getBookingInventorySummary()
+
+    if (summary.leftSeats !== null && seatIncrease > summary.leftSeats) {
+      httpError(409, `Total seats cannot exceed the remaining capacity by ${seatIncrease - summary.leftSeats} seats`)
+    }
+  }
+
+  const booking = await updateBookingDetails({
+    bookingId,
+    customerName: input.customerName,
+    customerPhone: input.customerPhone,
+    bookingModeId: bookingMode.id,
+    bookingMode: bookingMode.value,
+    quantity: input.quantity,
+    seatCount,
+    ticketTypeId: ticket.id,
+    ticketType: ticket.value,
+    unitPrice: ticket.price,
+    totalPrice,
+    remark: input.remark,
+    personInChargeId: auth.user.role === 'super_admin' ? undefined : auth.user.id
+  })
+
+  if (!booking) {
+    httpError(404, 'Booking not found')
+  }
+
+  return {
+    booking
+  }
+})
diff --git a/server/utils/booking-repository.ts b/server/utils/booking-repository.ts
index 7cd7670..3953131 100644
--- a/server/utils/booking-repository.ts
+++ b/server/utils/booking-repository.ts
@@ -35,6 +35,7 @@ type DbBookingRow = {
   customer_name: string
   customer_phone: string
   locale: AppLocale | string | null
+  deleted_at: Date | string | null
   booking_mode_id: string | null
   booking_mode: string
   booking_mode_label: string | null
@@ -129,6 +130,7 @@ function bookingSelectColumns(sql: any) {
     bookings.customer_name,
     bookings.customer_phone,
     bookings.locale,
+    bookings.deleted_at,
     bookings.booking_mode_id,
     coalesce(booking_modes.code, bookings.booking_mode) as booking_mode,
     booking_modes.label as booking_mode_label,
@@ -556,6 +558,7 @@ export async function getBookingByConfirmationToken(confirmationToken: string):
     from bookings
     ${bookingJoins(sql)}
     where bookings.confirmation_token = ${confirmationToken}
+      and bookings.deleted_at is null
     limit 1
   `
 
@@ -571,6 +574,7 @@ export async function getBookingByReceiptToken(receiptToken: string): Promise<Pu
     from bookings
     ${bookingJoins(sql)}
     where bookings.receipt_token = ${receiptToken}
+      and bookings.deleted_at is null
     limit 1
   `
 
@@ -589,6 +593,7 @@ export async function listBookings(options?: {
       from bookings
       ${bookingJoins(sql)}
       where dinner_events.is_active = true
+        and bookings.deleted_at is null
         and bookings.person_in_charge_id = ${options.personInChargeId}
       order by bookings.created_at desc
     `
@@ -597,6 +602,7 @@ export async function listBookings(options?: {
       from bookings
       ${bookingJoins(sql)}
       where dinner_events.is_active = true
+        and bookings.deleted_at is null
       order by bookings.created_at desc
     `
 
@@ -618,8 +624,9 @@ export async function updateBookingRemark(input: {
         set
           remark = ${input.remark},
           updated_at = now()
-        where id = ${input.bookingId}
-          and person_in_charge_id = ${input.personInChargeId}
+	        where id = ${input.bookingId}
+	          and deleted_at is null
+	          and person_in_charge_id = ${input.personInChargeId}
         returning *
       )
       select ${bookingSelectColumns(sql)}
@@ -634,8 +641,9 @@ export async function updateBookingRemark(input: {
         set
           remark = ${input.remark},
           updated_at = now()
-        where id = ${input.bookingId}
-        returning *
+	        where id = ${input.bookingId}
+	          and deleted_at is null
+	        returning *
       )
       select ${bookingSelectColumns(sql)}
       from updated_booking as bookings
@@ -662,8 +670,9 @@ export async function updateBookingPersonInCharge(input: {
         set
           person_in_charge_id = ${input.nextPersonInChargeId},
           updated_at = now()
-        where id = ${input.bookingId}
-          and person_in_charge_id = ${input.currentPersonInChargeId}
+	        where id = ${input.bookingId}
+	          and deleted_at is null
+	          and person_in_charge_id = ${input.currentPersonInChargeId}
         returning *
       )
       select ${bookingSelectColumns(sql)}
@@ -678,8 +687,9 @@ export async function updateBookingPersonInCharge(input: {
         set
           person_in_charge_id = ${input.nextPersonInChargeId},
           updated_at = now()
-        where id = ${input.bookingId}
-        returning *
+	        where id = ${input.bookingId}
+	          and deleted_at is null
+	        returning *
       )
       select ${bookingSelectColumns(sql)}
       from updated_booking as bookings
@@ -691,6 +701,178 @@ export async function updateBookingPersonInCharge(input: {
   return rows[0] ? mapBooking(rows[0]) : null
 }
 
+export async function getBookingById(bookingId: string, options?: {
+  personInChargeId?: string
+}): Promise<PublicBooking | null> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = options?.personInChargeId
+    ? await sql<DbBookingRow[]>`
+      select ${bookingSelectColumns(sql)}
+      from bookings
+      ${bookingJoins(sql)}
+      where bookings.id = ${bookingId}
+        and bookings.deleted_at is null
+        and bookings.person_in_charge_id = ${options.personInChargeId}
+      limit 1
+    `
+    : await sql<DbBookingRow[]>`
+      select ${bookingSelectColumns(sql)}
+      from bookings
+      ${bookingJoins(sql)}
+      where bookings.id = ${bookingId}
+        and bookings.deleted_at is null
+      limit 1
+    `
+
+  return rows[0] ? mapBooking(rows[0]) : null
+}
+
+async function syncBookingSeats(tx: ReturnType<typeof getSqlClient>, bookingId: string, currentSeatCount: number, nextSeatCount: number) {
+  if (nextSeatCount > currentSeatCount) {
+    for (let seatNumber = currentSeatCount + 1; seatNumber <= nextSeatCount; seatNumber += 1) {
+      await tx`
+        insert into booking_seats (
+          id,
+          booking_id,
+          seat_number,
+          seat_token
+        )
+        values (
+          ${randomUUID()},
+          ${bookingId},
+          ${seatNumber},
+          ${randomToken(24)}
+        )
+      `
+    }
+
+    return
+  }
+
+  if (nextSeatCount < currentSeatCount) {
+    await tx`
+      delete from booking_seats
+      where booking_id = ${bookingId}
+        and seat_number > ${nextSeatCount}
+    `
+  }
+}
+
+export async function updateBookingDetails(input: {
+  bookingId: string
+  customerName: string
+  customerPhone: string
+  bookingModeId: string
+  bookingMode: BookingMode
+  quantity: number
+  seatCount: number
+  ticketTypeId: string
+  ticketType: TicketType
+  unitPrice: number
+  totalPrice: number
+  remark: string | null
+  personInChargeId?: string
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  return await sql.begin(async (tx) => {
+    const [currentBooking] = await tx<{ seat_count: number | string }[]>`
+      select seat_count
+      from bookings
+      where id = ${input.bookingId}
+        and deleted_at is null
+      limit 1
+    `
+
+    if (!currentBooking) {
+      return null
+    }
+
+    const currentSeatCount = parseInteger(currentBooking.seat_count)
+
+    const [row] = await tx<DbBookingRow[]>`
+      with updated_booking as (
+        update bookings
+        set
+          customer_name = ${input.customerName},
+          customer_phone = ${input.customerPhone},
+          booking_mode_id = ${input.bookingModeId},
+          booking_mode = ${input.bookingMode},
+          quantity = ${input.quantity},
+          seat_count = ${input.seatCount},
+          ticket_type_id = ${input.ticketTypeId},
+          ticket_type = ${input.ticketType},
+          unit_price = ${input.unitPrice},
+          total_price = ${input.totalPrice},
+          remark = ${input.remark},
+          updated_at = now()
+        where id = ${input.bookingId}
+          and deleted_at is null
+          ${input.personInChargeId ? tx`and person_in_charge_id = ${input.personInChargeId}` : tx``}
+        returning *
+      )
+      select ${bookingSelectColumns(tx)}
+      from updated_booking as bookings
+      ${bookingJoins(tx)}
+      limit 1
+    `
+
+    if (!row) {
+      return null
+    }
+
+    await syncBookingSeats(tx, input.bookingId, currentSeatCount, input.seatCount)
+
+    return mapBooking(row)
+  })
+}
+
+export async function softDeleteBooking(input: {
+  bookingId: string
+  personInChargeId?: string
+}) {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = input.personInChargeId
+    ? await sql<DbBookingRow[]>`
+      with updated_booking as (
+        update bookings
+        set
+          deleted_at = now(),
+          updated_at = now()
+        where id = ${input.bookingId}
+          and deleted_at is null
+          and person_in_charge_id = ${input.personInChargeId}
+        returning *
+      )
+      select ${bookingSelectColumns(sql)}
+      from updated_booking as bookings
+      ${bookingJoins(sql)}
+      limit 1
+    `
+    : await sql<DbBookingRow[]>`
+      with updated_booking as (
+        update bookings
+        set
+          deleted_at = now(),
+          updated_at = now()
+        where id = ${input.bookingId}
+          and deleted_at is null
+        returning *
+      )
+      select ${bookingSelectColumns(sql)}
+      from updated_booking as bookings
+      ${bookingJoins(sql)}
+      limit 1
+    `
+
+  return rows[0] ? mapBooking(rows[0]) : null
+}
+
 export async function listBookingSeats(bookingId: string): Promise<PublicBookingSeat[]> {
   await ensureDatabaseReady()
   const sql = getSqlClient()
@@ -707,6 +889,12 @@ export async function listBookingSeats(bookingId: string): Promise<PublicBooking
       updated_at
     from booking_seats
     where booking_id = ${bookingId}
+      and exists (
+        select 1
+        from bookings
+        where bookings.id = booking_seats.booking_id
+          and bookings.deleted_at is null
+      )
     order by seat_number asc
   `
 
@@ -759,6 +947,7 @@ export async function getSeatReceiptBySeatToken(seatToken: string): Promise<{
       bookings.customer_name,
       bookings.customer_phone,
       bookings.locale,
+      bookings.deleted_at,
       bookings.booking_mode_id,
       coalesce(booking_modes.code, bookings.booking_mode) as booking_mode,
       booking_modes.label as booking_mode_label,
@@ -782,6 +971,7 @@ export async function getSeatReceiptBySeatToken(seatToken: string): Promise<{
     inner join bookings on bookings.id = booking_seats.booking_id
     ${bookingJoins(sql)}
     where booking_seats.seat_token = ${seatToken}
+      and bookings.deleted_at is null
     limit 1
   `
 
@@ -820,6 +1010,7 @@ export async function updateBookingSeatShareByReceiptToken(input: {
     from bookings
     where booking_seats.booking_id = bookings.id
       and bookings.receipt_token = ${input.receiptToken}
+      and bookings.deleted_at is null
       and booking_seats.id = ${input.seatId}
     returning
       booking_seats.id,
@@ -899,8 +1090,9 @@ export async function confirmBookingByConfirmationToken(confirmationToken: strin
         status = 'confirmed',
         confirmed_at = now(),
         updated_at = now()
-      where confirmation_token = ${confirmationToken}
-        and status = 'pending'
+	      where confirmation_token = ${confirmationToken}
+	        and deleted_at is null
+	        and status = 'pending'
       returning *
     )
     select ${bookingSelectColumns(sql)}
@@ -926,8 +1118,9 @@ export async function cancelBookingConfirmationByConfirmationToken(confirmationT
         status = 'pending',
         confirmed_at = null,
         updated_at = now()
-      where confirmation_token = ${confirmationToken}
-        and status = 'confirmed'
+	      where confirmation_token = ${confirmationToken}
+	        and deleted_at is null
+	        and status = 'confirmed'
       returning *
     )
     select ${bookingSelectColumns(sql)}
diff --git a/server/utils/bookings.ts b/server/utils/bookings.ts
index 03918bf..5be4c37 100644
--- a/server/utils/bookings.ts
+++ b/server/utils/bookings.ts
@@ -43,6 +43,38 @@ export function parseCreateBookingInput(body: {
   }
 }
 
+export function parseUpdateBookingDetailsInput(body: {
+  customerName?: string
+  customerPhone?: string
+  bookingMode?: BookingMode | string | null
+  quantity?: number
+  ticketType?: TicketType
+  remark?: string | null
+}) {
+  const customerName = normalizeFullName(body.customerName || '')
+  const customerPhone = normalizePhoneNumber(body.customerPhone || '')
+  const bookingMode = typeof body.bookingMode === 'string' ? body.bookingMode.trim().toLowerCase() : body.bookingMode
+  const ticketType = typeof body.ticketType === 'string' ? body.ticketType.trim().toLowerCase() : body.ticketType
+  const quantity = Number(body.quantity)
+  const remark = typeof body.remark === 'string' ? body.remark.trim() : ''
+
+  assertBadRequest(hasValidFullName(customerName), 'Guest or organizer name must be at least 2 characters')
+  assertBadRequest(isValidPhoneNumber(customerPhone), 'Phone number must include a country code, e.g. +60123456789')
+  assertBadRequest(typeof bookingMode === 'string' && bookingMode.length > 0, 'Booking mode is required')
+  assertBadRequest(Number.isInteger(quantity) && quantity >= 1, 'Quantity must be a whole number of at least 1')
+  assertBadRequest(typeof ticketType === 'string' && ticketType.trim().length > 0, 'Ticket category is required')
+  assertBadRequest(remark.length <= 1000, 'Remark must be 1,000 characters or fewer')
+
+  return {
+    customerName,
+    customerPhone,
+    bookingMode,
+    quantity,
+    ticketType,
+    remark: remark || null
+  }
+}
+
 export function parseBookingRemarkInput(body: {
   remark?: string | null
 }) {
diff --git a/server/utils/db-init.ts b/server/utils/db-init.ts
index 80da886..4912473 100644
--- a/server/utils/db-init.ts
+++ b/server/utils/db-init.ts
@@ -287,6 +287,7 @@ async function initializeDatabase() {
       remark text,
       status text not null default 'pending',
       confirmed_at timestamptz,
+      deleted_at timestamptz,
       created_at timestamptz not null default now(),
       updated_at timestamptz not null default now()
     )
@@ -322,6 +323,11 @@ async function initializeDatabase() {
     add column if not exists locale text not null default 'en'
   `
 
+  await sql`
+    alter table bookings
+    add column if not exists deleted_at timestamptz
+  `
+
   await sql`
     create unique index if not exists bookings_receipt_token_idx
     on bookings (receipt_token)
@@ -342,6 +348,11 @@ async function initializeDatabase() {
     on bookings (ticket_type_id)
   `
 
+  await sql`
+    create index if not exists bookings_deleted_at_idx
+    on bookings (deleted_at)
+  `
+
   await sql`
     create table if not exists booking_seats (
       id text primary key,
diff --git a/shared/booking.ts b/shared/booking.ts
index 30ee118..85bcfdf 100644
--- a/shared/booking.ts
+++ b/shared/booking.ts
@@ -158,6 +158,14 @@ export interface TransferBookingPicResponse {
   booking: PublicBooking
 }
 
+export interface UpdateBookingDetailsResponse {
+  booking: PublicBooking
+}
+
+export interface DeleteBookingResponse {
+  booking: PublicBooking
+}
+
 export function isBookingStatus(value: string | null | undefined): value is BookingStatus {
   return value === 'pending' || value === 'confirmed'
 }