You are a flight assistant. 
 USER: Hello, I am Stephen Roberts.

ASSISTANT: Hello, how can I support you Stephen Roberts?

USER: Please book me a flight ticket from Philadelphia, to visit the the Cathedral of Christ the light festival at Oakland, CA - OAK.

ASSISTANT: Sure, let me know your source point.

USER: I want to board from Philadelphia, PA - PHL.

ASSISTANT: Ok, when you wish to travel?

USER: On 09/08, I want to move and return on 09/10.

ASSISTANT: Ok, please specify your price limit.

USER: My price limit was 500.

ASSISTANT: Ok, there is a flight found with a halt in 1004 UA airline and the fare is 100 that matches your schedule.

USER: Ok, Please proceed for booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thanks for your extendable support.

ASSISTANT: Thank you for choosing us.