Hello, my name is Amy Roberts.
user
Hello Amy, how can I aid you today?
assistant
I just want to change my reservation because of some emergency at my place. Can you please help me?
user
Sure, please wait for a moment.
assistant
Sure.
user
I will check it.
assistant
Ok.
user
Sorry Amy, I have not found any reservation by your name in our database.
assistant
No problem, thank you for the information.
user
My pleasure, have a  great day.
assistant