Multi-turn user requests:
user: A complex decision awaits me. I'm planning an upcoming trip with limited resources and reevaluating my options. Could you first provide an estimate for a business class flight from San Francisco International to Los Angeles next Friday, November 10th, 2024, for an essential business engagement? Once the cost is known, please convert the estimate from USD to EUR for budgeting purposes, and if the cost is under 2000, proceed to book the flight using the secured credit card ID 144756014165 and access token abc123xyz.
user: Due to unforeseen circumstances, I'm unable to proceed with my journey to Los Angeles next week. Could the system initiate a cancellation process for the flight booking made earlier?
user: I believe it would be strategic to communicate these adjustments to my extended network. Construct a tweet highlighting the cancellation of my travel plans, and ensure to add relevant hashtags 'TravelUpdate' and 'BusinessTrip' relating to travel and business updates, for message, just tell that 'Just cancelled my trip to LA'. Be sure to authenticate using my username 'john' and password 'john1234'.

Tools involved: TwitterAPI
TravelAPI
Expected function-call sequence: TravelAPI.compute_exchange_rate
TravelAPI.get_flight_cost
TravelAPI.book_flight
TravelAPI.cancel_booking
TwitterAPI.post_tweet