Hi.
user
Hello, how can I help you today?
assistant
I want to change my reservation, please help me with it.
user
May I know your name?
assistant
I am Eric Thomas.
user
Ok., please wait  a moment.
assistant
Ok.
user
Sorry to say, no reservation found with your name.
assistant
Fine, Thanks for the information.
user
Thanks for reaching us, have a good day.
assistant