You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Brian White. I want to cancel my reservation due to postpone of my interview, can you help me to cancel my reservation?

ASSISTANT:  Ok, I will revert you in a moment.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Thank you for informing me.

ASSISTANT:  Thank you for availing us.