You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I would like to change my reservation as my trip got cancelled, can you please help me out with that?

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

USER: Ok.

ASSISTANT: May I know your good name please?

USER: I am Larry Edwards.

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

USER: That's ok, thank you.

ASSISTANT: You are welcome.