You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Charles Jackson. Can you help me in cancelling my recent reservation, as my interview is rescheduled?

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

USER: Ok.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Jackson, we couldn't find any reservation on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Welcome.