You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Andrew Nelson.

ASSISTANT: Ok.

USER: I want to cancel my reservation due to bad weather condition.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservation on your name. Thank you for approaching us.

USER: No problem, thanks for your service.