You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, let me know your name please.

USER: Please check the reservation on the name of Alexander Moore.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Moore, there is no active reservation found with your name in our records.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.