Query: user: I need to book a flight out of Chi-town. Economy fare, and on United Airlines, if possible.
assistant: What is your destination and what are the dates you like to travel?
user: I'm going to Portland, OR. I can leave around 13:15 and I want to come back on the 13th of March.
assistant: What date do you plan to leave?
user: Oops. I want to leave on March 5th.
assistant: When do you want the return flight to leave.
user: Coming back I can leave around 07:15. Outbound, though, I need to leave around a quarter to 1 in the afternoon. Just 1 passenger.

Intent: Flights:ReserveRoundtripFlights