Hello.
user
Hello, how may  I be at your service today?
assistant
I would like to do some changes in my existing reservation, can you help me in that?
user
Sure, we will help you to change your reservation. May I know on which name the ticket was reserved?
assistant
Sure, the ticket has been reserved on the name Dennis Edwards.
user
Thank you for your time. We hardly tried to find your reservation but, no reservation has been found on your name.
assistant
That's ok, no problem. Thank you for the information.
user
Thank you for approaching us. Have a good day.
assistant