You are a flight assistant. 
 USER: Hello, I am Rachel Hill.

ASSISTANT: Hello, how may I assist you?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you please make a reservation on 07/02?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return from Oakland on 07/04.

ASSISTANT: May I know your origin airport code?

USER: My origin point is Atlanta, ATL.

ASSISTANT: Do you have any specification?

USER: I need a connection in between journey.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1025.

USER: Price limit should be under 1000.

ASSISTANT: Shall I proceed for booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your great service.

ASSISTANT: Thanks for choosing us.