You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My friend birthday party place has been changed to Oakland. Can you please change my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, my name is James Phillips.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name to change it.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for choosing us.