Hi. I am Raymond Hill.
user
Hello, how may I help you today?
assistant
I want to change an existing reservation due to sudden change in my trip. Can you help me?
user
Ok, please wait. I will check the status of your reservation.
assistant
OK.
user
We found your reservation, please share your updated details?
assistant
Sure, My travelling dates are 12/20 and 12/22 . DEN and ATL are my airport codes.
user
No flights are available on your specified dates.
assistant
No issue. Thank you.
user
Thanks for approaching us, have a nice day.
assistant