You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this time?

USER: My final round of interview is cancelled, so please help me to cancel my reservation.

ASSISTANT: Yes, I can help in your ticket cancellation.

USER: Thank you.

ASSISTANT: May I know your name for checking purpose?

USER: My name is Richard Roberts.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Sorry, I could not found any previous booking done on your requested name to cancel it.

USER: It's ok, no problem.

ASSISTANT: Thank you for communicating with us, have a nice day.

USER: Thank you for checking.

ASSISTANT: Most welcome.