You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is William Robinson. I would like cancel an recent reservation.

ASSISTANT: Sure, I am here to help you.

USER: Sure.

ASSISTANT: Sorry William, there is no reservation found as per your name to cancel it.

USER: No problem, thank you the information.

ASSISTANT: You are welcome.