You are a flight assistant. 
 USER: Hello, I am Laura Baker.

ASSISTANT: Hello, how may I help you?

USER: Please help me in changing my reservation as the party which I have to attend got postponed.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, hold on.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.