You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Anna Hill.

ASSISTANT: What kind of help you are expecting from us today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I can help you in that.

USER: Sure.

ASSISTANT: Please wait, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry Anna Hill, there is no active reservation on your name to change it.

USER: Ok, thank you.

ASSISTANT: Thanks for approaching us, visit again.