Query: user: I need help finding a one-way flight. I prefer economy flights on United Airlines.
assistant: I can help you with that. Where will you be leaving from, and on what date?
user: I am leaving from Chi-town on March 4th.
assistant: What's your destination?
user: I am going to Seattle, WA.
assistant: United Airlines has 1 flight leaving at 3:50 pm with 0 stops for $158.
user: Is that ticket refundable?
assistant: No, unfortunately it is not.
user: What airport does that leave from?

Intent: Flights:SearchOnewayFlight