You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in changing my reservation as my meeting got postponed?

ASSISTANT: Sure. I will help you get this problem resolved. May I know your name please?

USER: Thank you. I am Brain Johnson.

ASSISTANT: Would you mind waiting for a moment please?

USER: No, I don't mind for waiting.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.