You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what sort of help are you seeking from us?

USER: Would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thanks. Ok, I am Raymond Adams.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for availing our services.