Hi.
user
Hello, how could I serve you today?
assistant
I want to change my existing reservation with the name of Mark Roberts. Can you help me in this?
user
Ok, please give me a moment.
assistant
Ok.
user
Sorry to inform, there is no reservation found on your given name.
assistant
It's ok, not a problem.
user
Thank you for choosing us.
assistant
Thank you for your information.
user