Query: user: Can you please find me one-way flights for 4 people?
assistant: Where are you departing from and when do you want to leave? Where is your destination?
user: I am leaving from Philadelphia and traveling to LA, leaving on the 10th of March.
assistant: There is an American Airlines flight with 1 stop that leaves at 10:10 am. The price per ticket is $298.
user: Are there any other available flights?
assistant: There is a Delta Airlines flight that leaves at 2:20 pm and has 1 stop for $285.
user: That flight sounds good. Can you search round trip flights for me?
assistant: When are you coming back?
user: I will return on the 12th of this month.
assistant: I found 1 flight for you. There is a Delta Airlines flight leaving at 2:20 pm and the return flight leaves at 1:40 pm. The price is $318 per ticket.
user: That sounds good.
assistant: Should I purchase them?
user: Yes, please book the ticket.

Intent: Flights:ReserveRoundtripFlights