You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: Ok, I am here to help you with that. May I know your name?

USER: Ryan Collins here.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.