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

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation as my business trip got cancelled. Please help me out.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to inform that, there is no reservation found on your name.

USER: That's fine, thanks for the information.

ASSISTANT: Thanks for opting us.