Overview

Add ancillary services such as seat selection or extra baggage to an existing prebook before confirming the final booking.

When to Use

• Seat selection - Allow users to choose specific seats after prebook
• Extra baggage - Let users add additional luggage allowance
• 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
• 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
• Updated payment: Automatically creates a new Stripe payment intent with the adjusted price
• 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

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.