Query: user: I will be traveling soon, are there some round trips available?
assistant: When are you planing to travel? What is your destination and from where are you departing?
user: I want something in Seattle on the 4th of this month and returning the 11th of March.
assistant: What is your destination?
user: I want to go to Vancouver, BC.
assistant: There is a flight from Delta Airlines. The departure takes off at 8:45 am and the return flight takes off at 3:20 am. It has a cost of $273.
user: Sounds great, can you book a ticket for me?

Intent: Flights:ReserveRoundtripFlights