You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to some reasons, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: May I know your name please to proceed further?

USER: My name is William Lewis.

ASSISTANT: Please be on hold for a moment.

USER: Sure, take your time.

ASSISTANT: William sorry, no reservation found as per your request.

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

ASSISTANT: Thank you for choosing us.