You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to change my reservation as my meeting venue got changed to another place, can you please help me out?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Kevin Green.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok.

ASSISTANT: Sorry Green, there is no reservation found as per your name to change it.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.