Query: user: i am looking for Economy class flights?
assistant: Where do you plan to visit?
user: I am traveling to Portland.
assistant: When do you plan to return and leave?
user: I am leaving on the 7th and returning of 10th of this month.
assistant: From where are you leaving?
user: i am leaving from Vancouver, BC and would prefer United Airlines.

Intent: Flights:SearchRoundtripFlights