Query: user: I need a one way flight in economy. I prefer Southwest Airlines.
assistant: Where will you be traveling?
user: I need to go to Seattle.
assistant: Where and when would you like to leave?
user: I will ne leaving on Thursday next week from Portland.
assistant: There is a Southwest Airlines flight leaving at 4:40 am with 0 stops with a price of $74.
user: That sounds good.
assistant: Do you want me to purchase the ticket?
user: Yes, for 1 person.

Intent: Flights:ReserveOnewayFlight