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

ASSISTANT: Hello, how may I help now?

USER: I want to cancel my recent reservation, please help me out.

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry there is no reservation found on your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for visiting us.