Query: user: Can you please search flights for me? I am leaving from Chicago.
assistant: What are your travel dates to leave and return?
user: I want to return on the 10th and leave on the 4th of March.
assistant: Where do you want to go?
user: I am traveling to Seattle, WA and prefer to use Southwest Airlines. There will be three people in my group.
assistant: I found 1 convenient flight for your trip. There is a Southwest Airlines flight outbound at 6:15 pm with the return flight leaving at 6:50 pm. The price of the ticket is $228.
user: What airport does the it fly into, and is the ticket refundable?
assistant: The flight arrives at Seattle-Tacoma International Airport. And, unfortunately, the ticket is non-refundable.
user: That flight sounds good.
assistant: Would you like me to buy the ticket?
user: Yes, please book that flight.

Intent: Flights:ReserveRoundtripFlights