You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Ok.

USER: Can you please help me in changing?

ASSISTANT: Sure. May I know your good name?

USER: I am Sarah Garcia.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

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

ASSISTANT: Thank you for approaching us.