You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Ok. Please, wait for a while.

USER: Sure.

ASSISTANT: May I know your name to check for the existing reservation ?

USER: Ok, you can check my reservation on the name of Brian White.

ASSISTANT: Give me a minute, please.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for your time, there is no reservation found on your name to proceed for modification.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.