Query: user: I am interested in finding a round trip flight.
assistant: Can you tell me the date when you are going to depart, and when you are going to return? Also could you tell me your destination?
user: I want to go to Chi-town, and I will be flying today, to return next Friday.
assistant: From which city will you be leaving for your flight?
user: I am interested in flights which leave from Washington.
assistant: How would you like having the direct flight with American Airlines which leaves at 7:10 pm, and when it returns it flies at 8:35 pm, the ticket of which costs $193.
user: Can you tell me for how many people you need tickets?
assistant: I just need ticket for 1 person.
user: Do you want your ticket to be an economy class one or a business class one.

Intent: Flights:SearchRoundtripFlights