You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Raymond White.

ASSISTANT: How can I help you at this moment?

USER: Due to changes in my plan to visit Oakland,  I need you to change by booking accordingly.

ASSISTANT: Ok, I am here to help you with that.

USER: Thank you. Good to know that.

ASSISTANT: Please wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: That's ok, thank you for the efforts.

ASSISTANT: Thank you for consulting us.