You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I approached your service as I need some help in cancelling my recent reservation. Will you do it for me?

ASSISTANT: Sure. Hold on for a moment, let me check in our previous reservation data base. Can you please help me providing your name?

USER: Katherine Nelson is my name, if the name exactly matching then only cancel my reservation.

ASSISTANT: Sorry Nelson, there are no flight reservation found on your name.

USER: Thank you for checking and responding, I will think what to do further.

ASSISTANT: Ok, thank you for choosing us. Have a good day.