You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am planning to book a flight ticket to OAK from ORD, can you please help me out?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: Sure, my planned travelling dates are Oct 12 and Oct 14.

ASSISTANT: May I know your name for further process?

USER: Sure, my name is David Walker.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Delta airline flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Ok, please confirm my reservation.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1004.

USER: Thank you for the help.

ASSISTANT: You are welcome David Walker.