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

User requests (one per turn):
user: I am at the gas station and ready to fill up my car with gasoline. I would appreciate it if you could manage filling a certain number liters into my vehicle to ensure it's properly fueled for the journey ahead. Use 2 decimal digit of the gallon amount
user: Let's do 30 liters.
user: With the fuel tank now filled with some gas, let's proceed to start the car engine. I'd be grateful if you could initiate the engine in 'START' mode for me.
user: After starting the engine, there was a slight vibration while I was driving. Would you mind checking the tire pressure to confirm everything's in good working order?

Expected function call sequence:
VehicleControlAPI.liter_to_gallon
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.check_tire_pressure
TicketAPI.create_ticket