Query: user: I'm looking for one way flights to London.
assistant: Departure date?
user: The 11th of March.
assistant: Departure city?
user: Leaving from Los Angeles on the 2nd, I don't care about the airline.
assistant: There is an American Airlines flight with 1 stop leaving 8:30 am for $377.
user: Sounds good to me.
assistant: Would you like tickets?
user: No, not now.
assistant: Can I help you with anything else?
user: Look up round trip flights returning on March 4th.
assistant: There's an American Airlines flight leaving 8:30 am and returning 3:05 pm for $343.
user: Flying into which airport?
assistant: Into Heathrow International Airport.
user: That sounds good.

Intent: Flights:SearchRoundtripFlights