Query: user: I'm interested in finding a round trip flight.
assistant: On what date you want to leave and when?What are your preferences about what you want to visit?
user: I want to leave from Las Vegas to Portland on March 13th.
assistant: On which date you plan the leaving?
user: I want on 2nd of this month.
assistant: According to your criteria I have 4 options.With American Airlines the cost will be $226 and the outbound flight leaves at 5:30 am.Return will be at 7:20 am.
user: Southwest Airlines is my preferate.Can you find me other flights?
assistant: With Southwest Airlines the outbound flight leaves at 2:35 pm and return at 4:55 pm.Total price is $221
user: Sounds perfect for me
assistant: You want to buy tickets?
user: No, not now.
assistant: Can I help you with something else?
user: Yes ,find me please one-way flights.
assistant: Southwest Airlines will be the company that have the outbound that leave at 2:35 pm with 1 stop.Cost for ticket will be $202.
user: Onward flight arrive at what hour?
assistant: Arrive at 7 pm.
user: The flight depart from witch airport?

Intent: Flights:SearchOnewayFlight