Hello.
user
Hello, how may I aid you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, I am here to help you with this. May I know your name please?
assistant
I am Jerry Mitchell.
user
Ok, wait for a mean while please.
assistant
Sure.
user
Sorry to say, that there is no reservation found as per your name to change it.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for reaching us.
assistant