Hello.
user
Hello. How can I assist you at this moment?
assistant
I am planning to book a flight ticket to DFW from LGA, can you please help me out?
user
Sure, I am happy to help you with that. Can I have your  travel  dates  please?
assistant
Sure, my trip dates are May 20 and May 22.
user
Ok,  please  let me know your  preferable timings of your  journey.
assistant
Ok, my return time must be in afternoon.
user
Do you  have any other specifications?
assistant
Yes, I am looking for a flight with 1 connection.
user
Can I have your  good name please?
assistant
Sure, my name is Margaret Lewis.
user
Sorry to inform you that no flight is available to you on your  planned dates in afternoon time.
assistant
It's ok, thank you for the information.
user
Thank you for choosing us, have a good day.
assistant