Multi-turn user requests:
user: I'm planning a journey from Los Angeles to New York on the morning of April 15th 2024, preferring to fly business class. However, my funds are in Euros. Arrange this flight using my pre-linked credit card with id 'card_123456789' and access token 'abc123xyz'.
user: With my flight now secured, I need to review the invoice outlining the costs involved. Retrieve that invoice for me, please.
user: There were hiccups during the booking process. Reach out to customer support and detail the challenges I faced.
user: Once you've reached out to them, please brief my colleague on the situation using my sender id.
user: The colleague's id is 'Kevin1048'.
user: Finally, compile and present all the responses received following the communications regarding the flight issue.

Involved API classes: MessageAPI
TravelAPI

Initial environment state:
TravelAPI: credit_card_list: card_123456789: card_number: 1234-5678-9876-5432
expiry_date: 12/25
cardholder_name: Michael Thompson
currency: EUR
balance: 5000
booking_record: booking_987654321: flight_number: LA1234
departure: Los Angeles
destination: New York
class: Business
date: 2024-04-15
cost: 1200
access_token: abc123xyz
token_type: Bearer
token_expires_in: 3600
token_scope: read_write
user_first_name: Michael
user_last_name: Thompson
budget_limit: 3000

Ground-truth function call path:
TravelAPI.compute_exchange_rate
TravelAPI.get_flight_cost
TravelAPI.book_flight
TravelAPI.retrieve_invoice
TravelAPI.contact_customer_support
MessageAPI.send_message
MessageAPI.view_messages_received

Functions held out until the model asks (by turn index):
5: send_message