You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Campbell.

ASSISTANT: How may I aid you?

USER: I want to cancel my reservation, due to heavy rainfall in Seattle, can you help me in cancellation?

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

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.