You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Christopher Young. I just want to cancel my reservation  due to postpone of my interview.

ASSISTANT: Ok, hold on for a moment.

USER: Sure.

ASSISTANT: Let me check in our datebase.

USER: Ok.

ASSISTANT: Sorry Young, there are no flight tickets reserved on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a good day.