You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I need to cancel my recent existing reservation due to postpone of Hockey finals. Can you help me with that?

ASSISTANT: Sure, we are gleeful to help you for cancellation. May I know your good name for cancellation?

USER: I am Jason Collins.

ASSISTANT: Ok, Jason Collins. Please hold on.

USER: Ok.

ASSISTANT: Sorry to say that, we did not found any reservation on the name of Jason Collins.

USER: Ok, no problem. Thanks for your quick response.

ASSISTANT: Thank you for choosing us. Have a nice day.