Query: user: I need a flight from Las Vegas
assistant: What is the destination? What is the departure date?
user: Phoenix on March 11th
assistant: Do you prefer United Airlines, Southwest Airlines or any other?
user: I prefer Delta Airlines. I need a refundable ticket
assistant: Flight from Las Vegas to Phoenix, with Delta Airlines; departure date March 11th, in Economy class, for 1 passenger. It's correct?
user: Yes, it is
assistant: Your flight is confirmed
user: Are there intermediate stops? What is the ticket cost?

Intent: Flights:ReserveOnewayFlight