You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I have planned for a holiday vacation tour but suddenly the dates got changed, so I would like to change my reservation, can you help me with it?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Raymond Moore.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: We don't have any reservation on your name to change.

USER: Its ok, thank you.

ASSISTANT: Thank you.