You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation with your name to cancel further.

USER: No problem, thank you.

ASSISTANT: You are welcome, have a great day.