You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that you are seeking from my side?

USER: Is this Central travel agency?

ASSISTANT: Yes, you are right place. This is a flight travelling agency only.

USER: I want to cancel my reservation, because I got to know the service of Delta airlines is not good, so I want to cancel my  reservation.

ASSISTANT: Sure, I can help you. Can I know your name for searching?

USER: My name is Michael Smith.

ASSISTANT: Please wait I will search for that.

USER: Sure.

ASSISTANT: Sorry Smith, as per your requested information there is no reservation showing on your name to cancel it.

USER: It's ok, thanks for your help.

ASSISTANT: Our pleasure to help you Smith. Have a nice day.

USER: Thank you.