You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I am Robert White. I want to  travel to Middle Harbor Shoreline Park at Oakland,CA-OAK. Can you book a direct flight?

ASSISTANT: Sure, please provide me your source point?

USER: I will depart from DC-DCA.

ASSISTANT: Can you please share me your journey dates?

USER: My travel dates are 04/07 and 04/09.

ASSISTANT: May I know your budget for flight ticket?

USER:  My budget is 1000.

ASSISTANT: We found a direct flight with Delta airline of flight number 1004 with price 200.

USER:  Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.