You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know, how can I be of your service?

USER: My meeting with president got postpone, Can you do the changes in my reservation?

ASSISTANT: Sure, I can help you in that. Can I know your name, to check your reservation status?

USER: I am Jonathan Jones.

ASSISTANT: Thanks for the details, please hold on.

USER: Ok.

ASSISTANT: Thanks for your time. Sorry Jonathan Jones, there is no active reservation on your name to change it.

USER: No issue, Thanks for the information.

ASSISTANT: Thanks for approaching us regarding your ticket changing process.