Query: user: I would like to find a flight ticket.
assistant: Do you prefer United Airlines, Air France or another airline? Where are you departing from?
user: I prefer United Airlines and I'm leaving from Vancouver, BC.
assistant: When are you leaving and returning?
user: I will be leaving on the 7th around 17:30 and returning 12:45 pm.
assistant: Where are you traveling?
user: I'm traveling to Chi-Town.
assistant: When are you coming back?
user: I will get back on the 12th.
assistant: Booking 1 economy flight Vancouver to Chicago with United Airlines for March 7th leaving at 5:30 pm and return is March 12th at 12:45 pm.
user: Yes, that sounds good. Is the ticket refundable and what is the cost?

Intent: Flights:ReserveRoundtripFlights