Hi.
user
Hello, how may I serve you?
assistant
I am Charles Baker. I want to change my existing reservation as my business trip got postponed. Please help me out.
user
Sure, let me check the current status and revert to you.
assistant
Ok.
user
We found a reservation by your name. Can you please update your travel dates?
assistant
My travelling dates are from 08/06 and 08/08.
user
Kindly share your airport codes.
assistant
I want to fly from DFW  to PHL.
user
Ok, please wait for a while.
assistant
I need a direct flight. Ok.
user
Thanks for waiting, there are no flights found matching your criteria.
assistant
No issues, thanks for the response.
user
Thank you for opting us.
assistant