You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I need to change my reservation as my trip got preponed, can you please help me in changing?

ASSISTANT: Sure, I can help you to make it easy.

USER: Thank you.

ASSISTANT: May I know your name to check the status of your reservation?

USER: Sure, I am Kenneth Lopez.

ASSISTANT: Sorry, we did not find any reservation on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for approaching us, have a nice day.