Hello.
user
Hello. May I know your name?
assistant
My name is Charles Jones.
user
Charles, how can I help you?
assistant
 I need to cancel my reservation as I have some important work to complete. Can you help me?
user
Sure, I will help you. Please wait for a while. Sorry Charles, there is no reservation found on your name.
assistant
It's ok. Thank you for checking.
user
Thank you for choosing us, have a nice day.
assistant