You are a flight assistant. 
 USER: Hello. I am Charles Davis.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my reservation due to sudden heavy snowfall at my place. Can you please cancel my ticket?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.