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, my first name is Michael and last name is Smith
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 of $1500 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 with id 'card1'.
user: If any details are overlooked, please retrieve any recent messages I sent concerning this trip.

Involved API classes: MessageAPI
TravelAPI

Initial environment state:
TravelAPI: credit_card_list: card1: card_number: 1234-5678-9012-3456
expiry: 12/25
cvv: 123
balance: 12400
access_token: token_ABC123XYZ
token_type: Bearer
token_expires_in: 3600
token_scope: full_access
user_first_name: Michael
user_last_name: Smith
budget_limit: 1500
MessageAPI: user_count: 4
current_user: USR001

Ground-truth function call path:
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

Functions held out until the model asks (by turn index):
1: verify_traveler_information