You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can support you now?

USER: I have made an earlier reservation to attend for a conference, due to some issues conference has been postponed. Can you please be my helping hand to change it?

ASSISTANT: Definitely, I will help you out.

USER: Thanks for considering my request.

ASSISTANT: On whose name, you have reserved the ticket earlier?

USER: Please check my reservation on the name of Catherine White.

ASSISTANT: Thanks for your name, please standby.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for approaching us.