Hi.
user
Hello, How can I serve you?
assistant
Will you please be my helping hand in changing an existing reservation?
user
Sure, to check reservation may I know your name?
assistant
I am Jeffrey  Campbell.
user
Please wait a moment.
assistant
Sure.
user
We are sorry to say that there is no reservation found with your name.
assistant
It's ok, thanks for the information.
user
Thank you for choosing us.
assistant