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

User requests (one per turn):
user: First, you need to know how much gasoline you added to your car, expressed in liters. You've just filled up with 30 gallons, so how many liters of fuel does that equate to?
user: Let's take the initiative to start the engine in start mode. We want to ascertain that it operates smoothly with the increased fuel level.
user: Inspect each tire's condition and confirm they are in optimal shape.
user: Upon verifying the tire pressure, we should share our findings on Twitter to keep everyone informed. Post the tweet message 'Tire pressures are optimal!'. Utilize hashtags #CarMaintenance and tag my friend's account for professional insights.
user: The account you need to tag is 'VehicleGuru'.

Expected function call sequence:
VehicleControlAPI.gallon_to_liter
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.check_tire_pressure
TwitterAPI.post_tweet