You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to surprise my sister by celebrating her birthday on 12/25. Can you please book a flight ticket to Oakland, OAK?

ASSISTANT: Sure, let me know your origin airport code.

USER: I would like to board from New York, JFK.

ASSISTANT: Please share your return journey date.

USER: My return will be on 12/27.

ASSISTANT: Let me know your specifications?

USER: I need a lay by in between my journey. Price of flight ticket should not exceed 5000.

ASSISTANT: We found a flight with single connection and price is 200 of 1005 flight. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed with AA airlines.

USER: Thank you for your help.

ASSISTANT: Thank you. May I know your name?

USER: I am Robert Anderson.

ASSISTANT: Thank you for providing your name.