Multi-turn user requests:
user: I need you to verify my travel documents before I embark on this journey. Confirm if my personal details match the required criteria. Once all checks are done, I'll proceed. For reference, my birthdate is February 14st 1962 ans passport number is P87654321
user: I'm considering flying but need to know the cost of traveling from here. Let's identify the nearest airport to Chicago first, then we'll continue to check airfare from there to Los Angeles for Aug 10th 2024.
user: Now that I have the flight cost, please set a budget for my trip using my account token 'token_ABC123XYZ' to make sure everything's in order.
user: Book this flight for me, please. I am flexible with travel classes but would prefer to keep it within my budget. I'll promptly handle the payment using my saved card details.
user: The card id is 'card1'.
user: Following the booking, could you send a confirmation message to my travel partner with message id uk1234, ensuring they have all the necessary details? My sender id is us2333.
user: If any details are overlooked, please retrieve any recent messages concerning this trip.

Ground-truth function call sequence:
TravelAPI.verify_traveler_information
TravelAPI.get_nearest_airport_by_city
TravelAPI.get_flight_cost
TravelAPI.set_budget_limit
TravelAPI.book_flight
MessageAPI.send_message
MessageAPI.view_messages_received