Query: user: Could you look up some round trip flights?
assistant: Where are you planning to visit and leave from? What are the dates you would like?
user: I'd like to travel to Ciudad de Mexico from SFO on the 11th of March.
assistant: When would you like to leave?
user: There'd be 3 people leaving on next Tuesday. I'd like a flight with United Airlines.

Intent: Flights:SearchRoundtripFlights