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

User requests (one per turn):
user: Estimate the distance between San Francisco and Rivermist. Afterwards, fill the tank with 40 additional liters of gasoline for my quick trip. Round the fill amount to two decimal places
user: Preparations are complete. Start the engine and help me tweet about this journey containing message 'Just started my journey!' with #RoadTrip and @carenthusiast.

Expected function call sequence:
VehicleControlAPI.liter_to_gallon
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.get_zipcode_based_on_city
VehicleControlAPI.estimate_distance
TwitterAPI.post_tweet