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?
assistant: Please confirm : A Delta Airlines Flight from Philadelphia to London which leaves on today at 10:15 am and the return flight will leaves on March 13th at 8:15 am. An Economy class ticket for 1 person.
user: Can you change the return time to morning 8?
assistant: Okay, please confirm for the return flight time at 8 am for the Economy class.
user: Yes, that is okay. Please check with the origin Airport.
assistant: Sorry, I could not make it as you required. Do you want me to do anyother help?
user: Yes, can you check the flight on the 4th?
assistant: Please confirm: A Delta Airlines Flight from Philadelphia to London which leaves on next Monday at 10:15 am and the return flight will leaves on March 13th at 8 am. An Economy class ticket for 1 person.
user: Can you check with Southwest Airlines for the departure time quarter to 7 in the morning?

Intent: Flights:ReserveRoundtripFlights