Hello.
user
Hello, how can I provide assistance to you? May I know your  good name please?
assistant
Due to an emergency, I want to cancel my recent reservation. My name is Jack Davis.
user
Sure. please wait for a while, I will check and revert you.
assistant
Ok.
user
We are sorry to inform you that, we did not find any reservation against your name.
assistant
Not a problem. Thank you.
user
Thank you for choosing us. Have a great day.
assistant