Multi-turn user requests:
user: I just relocated to Rivermist and I'm looking to book a flight to Los Angeles for a crucial business meeting. Could you arrange the flight for me, using my credit card with id 'card_6789'? I need it booked for next Friday 2024-11-10, in business class, with an estimated cost of approximately $1200. Additionally, I have received my new access token: 2278-9812-3456-4567. Once the flight is confirmed, please ensure you acquire the invoice for this transaction as it's necessary for my reimbursement.
user: After securing my flight reservation, I've realized I have some clarifications needed about my travel itinerary. Would you be able to send an inquiry to customer support on my behalf? Please use my latest booking details and incorporate the concerns I have regarding my luggage restrictions within your message.

Ground-truth function call sequence:
TravelAPI.list_all_airports
TravelAPI.get_nearest_airport_by_city
TravelAPI.book_flight
TravelAPI.retrieve_invoice
TravelAPI.contact_customer_support
MessageAPI.send_message
MessageAPI.view_messages_received