Multi-turn tool-use scenario.
Tools involved: TwitterAPI
VehicleControlAPI

User requests (one per turn):
user: I need to fill 150 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. How much is that in gallon? Round it to the nearest integer and fill that amount.
user: Find out the distance from San Francisco to Rivermist for my travel plans to determine fuel consumption and travel time.
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.

Expected 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