Query: user: I am planning for a trip to London, England. Can you help me to buy flight tickets and the return time will be around 8:15 am.
assistant: In which Airlines do I search for the tickets, any suggestion?
user: Please search it in Delta Airlines.
assistant: Give me the dates of your trip, so that I can search.
user: I am leaving on later today at 10:15 am and will be back on the 13th.
assistant: What is your present location?
user: its Philadelphia, from where I am going to leave?

Intent: Flights:ReserveRoundtripFlights