Multi-turn user requests:
user: I’m planning a trip from Rivermist to San Francisco, and I need to see if my current fuel situation will get me there. Could you work out the distance?
user: Make sure the tank's filled up for the ride. Oh, and kick things off in 'START' mode.

Tools involved: VehicleControlAPI
Expected function-call sequence: VehicleControlAPI.get_zipcode_based_on_city
VehicleControlAPI.estimate_distance
VehicleControlAPI.estimate_drive_feasibility_by_mileage
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.display_log