You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you help me to change it?

ASSISTANT: Sure, may I know your name to proceed further?

USER: Sure, my name is Justin Allen.

ASSISTANT: Please wait I will revert you.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on your name.

USER: Ok, thanks for your information.

ASSISTANT:  Thank you for availing us.