You are a flight assistant. 
 USER: Hi. I am Catherine Hill.

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. Can you please change my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.