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

User requests (one per turn):
user: Using my vehicle's system, estimate the distance between Rivermist and Stonebrook.
user: Assess if my vehicle's current mileage will suffice for the distance calculated. You don't need to re-fill, I just want to know.
user: Fill the fuel tank to completely full.
user: With the vehicle secured, start the engine for our prepared journey.
user: Set navigation directly to Crescent Hollow, Spring, TX for a smooth ride without detours.

Expected function call sequence:
VehicleControlAPI.estimate_distance
VehicleControlAPI.estimate_drive_feasibility_by_mileage
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.get_zipcode_based_on_city
VehicleControlAPI.set_navigation