Multi-turn user requests:
user: Consider this: A patient, a traveler in this context, wants to book a flight using the card with id 'card_7629' and the access token 'abc123xyz', expiring on 10/2025, with CVV 456. They intend to fly from Los Angeles to Tokyo on December 15, 2024, in business class, estimated at $1,200.
user: Reflect on the importance of verifying information. Our traveler needs to confirm their flight booking's details for assurance.

Tools involved: TicketAPI
TravelAPI
Expected function-call sequence: TravelAPI.register_credit_card
TravelAPI.book_flight
TravelAPI.retrieve_invoice
TravelAPI.contact_customer_support
TravelAPI.cancel_booking
TicketAPI.create_ticket
TicketAPI.close_ticket