Multi-turn user requests:
user: My vehicle's fuel tank is low; please refuel it with 30 gallons. Following that, initiate the engine using ignition mode 'START', ensuring all doors are secured and the parking brake is set to avoid errors.
user: Post-engine start, verify tire pressure. If it's insufficient (less than 30.0 psi), proceed to the nearest tire shop at 456 Oakwood Avenue, Rivermist, 83214.

Tools involved: VehicleControlAPI
Expected function-call sequence: VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.check_tire_pressure
VehicleControlAPI.find_nearest_tire_shop