You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, can I assist you?

USER: I am James Allen. I want to go for my friend marriage, so please help me for booking a flight ticket.

ASSISTANT: OK, we will help you, could you tell me the destination?

USER: My source and destinations are CA-SFO, GA-ATL.

ASSISTANT: May I have your journey dates?

USER: And my departure day is Sept/9, return day is Sept/11.

ASSISTANT: OK, thanks for details, we found a reservation on Delta airline, flight number : 1023. It costs only 100 with single connection. Could I proceed for further booking?

USER: Yes please.

ASSISTANT: Your booking has been confirmed.

USER: OK, thank you for your service.

ASSISTANT: Thank you, have a good day.