You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I support you now?

USER: I am Joseph Wilson. I want to cancel my reservation, due to my interview was postponed.

ASSISTANT: Ok, wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel it.

USER: Thanks for your service.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you.