You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am Brandon Martinez want to travel to Washington, DC-DCA to attend my Graduation day at college.

ASSISTANT: Ok.

USER:  Can you book a connecting flight?

ASSISTANT: Sure. May I know, when you are planning to start your journey?

USER: I will start my journey on 01/23.

ASSISTANT: Can I have your boarding airport code please?

USER: I will depart from CA-OAK.

ASSISTANT: When you have planned to catch the return flight?

USER: I will return on 01/25.

ASSISTANT: Do you have price limit?

USER: I can spend up to 500.

ASSISTANT: Thank you for sharing your details, please wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with AA airline, flight number 1010 with fare 200 and a lay by. Can I proceed to book?

USER: Ok, you can proceed with booking.

ASSISTANT: Your reservation has been processed.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.