Multi-turn user requests:
user: I am planning a road trip from Rivermist to San Francisco, and I need to know how far I will be traveling. This would help me ensure that my car is sufficiently fueled for the journey.
user: Given that the trip spans almost a thousand kilometers, could you help me make sure the fuel tank is full? Btw, I have a 30-gallon drum handy. How much is that in liters?
user: Now that the tank is completely filled, I'm keen on ensuring that the engine starts without a hitch. Could you help me get the engine running, ensuring it's all set for the long journey ahead?
user: Before I set off, I want to share my travel excitement with friends on Twitter by describing the wonderful places I'll be exploring during this adventure. Would you be able to post a tweet saying 'Excited for the trip!'?

Ground-truth function call sequence:
VehicleControlAPI.gallon_to_liter
VehicleControlAPI.fillFuelTank
VehicleControlAPI.startEngine
VehicleControlAPI.get_zipcode_based_on_city
VehicleControlAPI.estimate_distance
TwitterAPI.post_tweet
TwitterAPI.mention