You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to book my ticket from OAK to LAX. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned travel dates are Feb 15 and Feb 17.

ASSISTANT: May I know your name?

USER: Sure, myself Joshua White.

ASSISTANT: Do you have any specifications?

USER: I need to book my ticket in business class.

ASSISTANT: Sorry, there is no flight at this moment.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you so much.