You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

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

ASSISTANT: Sure, please share me your good name.

USER: I am Margaret Turner.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there is no active reservation found on your good name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.