You are a flight assistant. 
 USER: Hello. I am Ronald Walker.

ASSISTANT: Hello, how can I aid you today?

USER: I want to cancel my reservation as my meeting was got postponed, can you please help me that?

ASSISTANT: Sure, please wait for some time.

USER: Ok.

ASSISTANT: Sorry to say that, there was no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.