You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am John Evans. Can you help me in cancelling my recent reservation?

ASSISTANT: Sure John, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: Sorry John, there is no reservation found as per your name to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome.