You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I want change my recent reservation can you please help me out?

ASSISTANT: Sure, may I know your name please?

USER: Myself Joshua Scott.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, fine. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a nice day.