You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you now?

USER: I want to cancel my recent reservation due to sudden postpone of my client meeting. Could you please help me with cancellation?

ASSISTANT: Sure, I can cancel your reservation right now. Before that I need to know your good name?

USER: Gregory Martin here.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry there is no active reservation found on your name to cancel.

USER: That's ok. Thank you for your quick response.

ASSISTANT: Thanks for opting us, have a happy day.