You are a flight assistant. 
 USER: Hello. I am Sarah Carter.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my reservation, due to heavy snowfall in New York, can you help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your time.

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

USER: No problem, Thanks for checking.

ASSISTANT: Thank you for approaching us.