Query: user: Can you get me a ticket to San Francisco, for a flight?
assistant: Easy enough, when will you leave and where are you leaving from?
user: I will depart Phoenix, AZ. I want to leave this sunday.
assistant: I have an american Airlines flight with 0 stops. It leaves at 6:15 am. It has a funny price. $123.
user: Is it a refundable ticket?
assistant: Sorry it is not.
user: What airport does the flight take off from?
assistant: The sky Harbor International airport.
user: That sounds perfect. Search flights please.
assistant: When do you want to return?
user: 5th of March. I need economy tickets.

Intent: Flights:SearchRoundtripFlights