Query: user: I'm about to take a trip soon. Can you help me search for some round trip flights?
assistant: Sure thing. Where will you be taking off from? Where are you planning to visit.
user: I am looking for flights from NYC to London, England.
assistant: Okay, I just need to know a few more details. What date are you planning to leave? And when do you wish to return?
user: I want to leave on the 9th of this month and I need to return by the 13th of March.
assistant: Okay, I've found 2 convient flights for you. There is an American Airlines flight taking off at 5:25 am with a return flight taking off at 2:05 pm. Total cost round trip will be $368.
user: No, that doesn't work for me. Are there any other available flights?
assistant: There is an outbound United Airlines flight leaving at 2:40 pm with a return flight that leaves at 0:25 am. The total cost round trip would be $282.
user: Okay, now that flight sounds good.
assistant: Can I help you with anything else?
user: Yes, can you help me buy tickets? I'd like to purchase 2 Economy class tickets.

Intent: Flights:ReserveRoundtripFlights