You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Phillips here.

ASSISTANT: Ok Kimberly Phillips, how may I assist you?

USER: Actually I want to visit my old friend house and trying to book a flight ticket.

ASSISTANT: That's great, may i know your source and destination codes?

USER: Sure, my source and destination codes are from OAK to ATL.

ASSISTANT: For further proceedings may I know journey dates?

USER: Sure. I want to travel on these dates that is from 09/25 to 09/27.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Yes, there is a flight 1021 of Delta airlines.

USER: Ok, please book my ticket.

ASSISTANT:  Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you and have a great day.