Hello. I am Jason Johnson.
user
Hello, how can I aid you?
assistant
I have some personal maters that need fixing so I need change an existing reservation. Can you please help me in that?
user
 OK, please wait I will revert you in a moment.
assistant
Sure.
user
Sorry, no reservation was found on your name.
assistant
That's not a problem. Thanks for your information.
user
Thank you for availing us.
assistant