Query: user: I would like a one-way flight via Economy class.
assistant: Where would you be departing from and what is your destination? When would you like to leave?
user: I will be traveling from SD to Vegas on the 6th.
assistant: There are 4 flights available. You can fly on American Airlines. There are 0 stops to your destination. The flight leaves at 7:15 pm and cost $92.
user: Is there anything else? I want to leave Seattle on the 7th of this month.
assistant: There is a flight on Delta Airlines that leaves at 6:10 am. There would only be 1 stop to your destination and the cost of the ticket is $221
user: That would be great.
assistant: Would you like me to purchase the tickets?
user: No, I don't want any. I want you to search for round trip flights for four people.
assistant: When would you be returning?
user: On the 9th

Intent: Flights:SearchRoundtripFlights