You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my ticket due to dense fog in my place.

ASSISTANT: Ok, may I know your good name?

USER: Jack Walker here.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.