You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I have an earlier reservation to sign a new contract for new project, due to some problem it got postponed.

ASSISTANT: OK.

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your name to find your reservation?

USER: My name is George Edwards.

ASSISTANT: Sorry, we did not find any reservation on your name to change.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us, have a great day.