Multi-turn user requests:
user: I need to fill 15 liters of gasoline into my vehicle for today's trip and then start the engine using the standard start mode to ensure everything is operational before departure.
user: Find out the distance for my travel plans to determine fuel consumption and travel time.
user: The cities involved are San Francisco and Rivermist.
user: Also, on Twitter, let everyone know about my upcoming trip from San Francisco to Rivermist, with content 'Excited for my trip from San Francisco to Rivermist!', mentioning @TravelBuddy and using the hashtag #JourneyAhead.
user: After posting, make sure to add a mention of @RoadsideAssistance to the tweet we just created to ensure everyone is covered for emergencies.

Ground-truth function call sequence:
VehicleControlAPI.liter_to_gallon
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.get_zipcode_based_on_city
VehicleControlAPI.estimate_distance
TwitterAPI.post_tweet
TwitterAPI.mention