Query: user: I have a short trip I want to go on, and I need some help buying plane tickets.
assistant: What's your origin and what time do you want to leave? Also do you have an airline you prefer such as Delta Airlines, Air Canada, or anything else?
user: I'm going to be travelling from Philadelphia and I want to leave in the evening 5:15. And I like flying on American Airlines.
assistant: When would you like your return flight to leave.
user: For the return flight I'd prefer to leave at 13:45.
assistant: And what's the date of your return?
user: For my return, it'll be the 11th of March.
assistant: And what's your destination.
user: I'll be going to London, UK.

Intent: Flights:ReserveRoundtripFlights