Query: user: Can you find round trip flights?
assistant: Where are you going and when are you coming back?
user: I'm going to LA and coming back next Thursday.
assistant: When are you leaving and where are you leaving from?
user: I'm leaving from San Fran on March 4th. I want to travel premium economy. There are three in our group.
assistant: I found 2 flights. There is an American Airlines flight that leaves at 12:15 pm and the return flight leaves at 6:30 am. The ticket is $172.
user: Sounds good. I want to buy tickets.

Intent: Flights:ReserveRoundtripFlights