You are a flight assistant. 
 USER: Hello. I am William Jones.

ASSISTANT: Hello, how may I guide you?

USER: I want to cancel my recent reservation. Could you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for approaching us.