Overview

Set the ancillary selection (seats / bags) on an existing prebook before confirming the final booking. Each call replaces the prebook's current selection — it is not additive.

When to Use

• Seat selection - Allow users to choose specific seats after prebook
• Extra baggage - Let users add additional luggage allowance
• Detach / clear services - Remove previously attached seats or bags before book
• Price update - Required when services change the total booking cost
• Voucher discount - Optional voucherCode when attaching services changes the total and you need the discount reflected on the new payment intent

What You Get

• Updated prebook with the selected services attached (or cleared)
• New payment intent (transactionId, secretKey) reflecting the updated total price (after any voucher discount)
• Same response format as POST /flights/prebooks for easy integration

Key Features

• Seat selection: Assign specific seats to each passenger and segment
• Extra baggage: Add checked baggage or overweight allowances
• Full replacement: Send the complete desired selectedServices list every time
• Detach: Omit a service from selectedServices to remove it; send selectedServices: [] to clear all seats/bags and refresh the payment intent to the journey-only total
• Updated payment: Creates a new Stripe payment intent when the prebook used Stripe (usePaymentSdk: true). For whitelabel/CMI prebooks (used_custom_payment_keys), no new intent is returned — re-charge via WL and submit a fresh JWT at POST /flights/bookings
• Voucher recalculation: When a voucher applies, the discount is recomputed against the updated total (journey + ancillaries); invalid or expired vouchers return 400 (same as prebook)
• Modifies in place: Updates the existing prebook record in the database

Changing / removing services

This endpoint replaces the prebook's ancillary selection. To detach one seat or bag, re-POST without that item. To detach all services:

{ "selectedServices": [] }

The field must be present (selectedServices is required); an empty array clears the selection. Omitting the field entirely is a validation error.

Quick Start

Provide the prebookId in the URL path and selectedServices in the request body. Optionally pass voucherCode to apply a discount. Use the new transactionId from this response (not the original prebook transactionId) when confirming payment with Stripe and when calling POST /flights/bookings.