Multi-turn user requests:
user: Please confirm the details for traveler Matt Bradley. His birth date is April 23, 1995, and his passport starts with 'US', numbered 9148817941. We need to make sure everything checks out before proceeding with the booking.
user: Wonderful! Next step is identifying the closest airport to Rivermist so I can arrange flights to Los Angeles for the upcoming month at 2024, 11/15. Let's handle the booking using the travel details provided, utilizing my go-to credit card with id 'card_2023' and the accompanying access token 'abc123xyz456' to complete the processing.
user: The booking's in place, and I'd love to review the invoice details. Can you fetch the invoice from the latest booking to ensure every cost is properly listed?
user: I've got a few questions regarding the booking. Could you reach out on my behalf to customer support to saying 'Requesting clarification on booking details'?
user: I'm thinking about adjusting my travel plans shortly. When you get a chance, please cancel my prior booking and ensure the charge is refunded to my card.
user: To share the experience with my buddies, I'd like to craft a tweet about my recent travel escapades and tag the airline for extra visibility. Let's throw in some hashtags #TravelSuccess #RivermistJourney. Here's my information, username is 'john' and password 'john1234'. The message to send is 'Just booked a flight to LA!' 

Ground-truth function call sequence:
TravelAPI.verify_traveler_information
TravelAPI.get_nearest_airport_by_city
TravelAPI.book_flight
TravelAPI.retrieve_invoice
TravelAPI.contact_customer_support
TravelAPI.cancel_booking
TwitterAPI.post_tweet