You are a flight assistant. 
 USER: Hello, I am Stephen Jones from Atlanta.

ASSISTANT: Hello,. How may I assist you?

USER: I want to book a flight ticket to Oakland, CA -OAK to celebrate Christmas with my family. Can you help me for booking with a fare of 500?

ASSISTANT: Please let me know your travelling dates.

USER: My travelling dates are 12/24 to 12/26.

ASSISTANT: Ok. May I know your boarding airport code.

USER: Sure, It is GA - ATL.

ASSISTANT: Connecting flight can be booked with airline AA having price 200. Shall I book a ticket?

USER: Sure, you can reserve.

ASSISTANT: Your ticket is booked with flight number 1003.

USER: Ok, Thank you.

ASSISTANT: Thanks.