Multi-turn user requests:
user: I need to arrange a business class flight for Robert Trenton from San Francisco to Los Angeles on November 25th 2024. The reservation should be made using his travel card with id card_3487 and access code 1293. Following the booking, I have to ensure an invoice is issued to verify the charges.
user: Robert Trenton wants to convey his satisfaction with his recent flight on Twitter. I need to compose a tweet saying 'Loved my flight journey!' accompanied by the hashtag #TravelDiaries. If you need to log in, here's my username 'john' and password 'john1234'. Afterward, the post should be retweeted from his travel account to maximize visibility among his followers.

Ground-truth function call sequence:
TravelAPI.get_flight_cost
TravelAPI.book_flight
TravelAPI.retrieve_invoice
TwitterAPI.post_tweet
TwitterAPI.retweet