You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I am here to help you with this. May I know your name please?

USER: I am Karen Phillips.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Karen, there is no reservation found as per your name to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome.