Hello.
user
Hello. How may I aid you today?
assistant
I made a reservation earlier to visit Denver but now I want  my return flight in the morning time. Can you help me in changing my reservation?
user
Sure, I am gleeful to help you with that.
assistant
Thank you.
user
Please share your name to check your previous reservation.
assistant
Sure, Benjamin Wright here.
user
Please be on hold.
assistant
Sure.
user
There is no reservation found on your name in our records.
assistant
Ok, no problem. Thank you for your response.
user
Thank you for reaching us, hope you have a great day.
assistant