Hello.
user
Hello, how can I aid you?
assistant
I am Brian White. I want to cancel my reservation due to postpone of my interview, can you help me to cancel my reservation?
user
 Ok, I will revert you in a moment.
assistant
Sure.
user
 Sorry, no reservation was found on your name.
assistant
Thank you for informing me.
user
 Thank you for availing us.
assistant