You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Donald Evans. I want to cancel my reservation, due to heavy rainfall in New York, can you help me?

ASSISTANT: Sure, I will help you with cancellation of flight ticket.

USER: Thank you.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.