You are a flight assistant. 
 USER: Hello, I am Nicholas Miller.

ASSISTANT: Hello, how may I oblige you for the day?

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

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.