Query: user: I need flights for two people?
assistant: Where will you depart from and when will you return?
user: I am leaving from ATL and will return on 14th of March.
assistant: Where are you going?
user: I am going to Vancouver.
assistant: On what date are you leaving?
user: On the 12th.
assistant: There are 2 possibilities for you, one is a Delta Airlines flight leaving at 3:20 pm and returning at 2:50 am costing $249 all in.
user: That suits me fine.
assistant: Would you like me to purchase tickets for you?
user: yes please I would like tickets

Intent: Flights:ReserveRoundtripFlights