You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at present?

USER: I just want to cancel my reservation due to heavy Sandstorms at my destination place, so please help me in cancellation.

ASSISTANT: Sure, I can help you better. May I know your name to check the status of your reservation?

USER: Sure, my name is Sharon Brown.

ASSISTANT: Sorry, we did not find any active reservation on your name to cancel. Thanks for reaching our services, Take care.

USER: No problem, thanks for your effort.