Query: user: I need a plane ticket. I want the return trip to leave at around a quarter to 9 in the night.
assistant: What time do you want to leave, and what day do you want to return?
user: I'd like to leave at a quarter past 6 in the evening, and return on March 13th.
assistant: Where are you leaving from , and what is your destination? What day do you want to leave?
user: I want to leave on the 10th of this month from Chi-town to San Francisco.
assistant: Which airline? Air Canada, British Airways, or something else?
user: I like Southwest Airlines.

Intent: Flights:ReserveRoundtripFlights