You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: William Williams here. I want to cancel my reservation, due to heavy rainfall in New York. Ok.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: That's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.