You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Brown here.

ASSISTANT: How can I aid you?

USER: I want to attend a Seminar in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are from 04/19 to 04/21.

ASSISTANT: Please provide me your respective airport codes.

USER: My airport codes are from ORD to ORD.

ASSISTANT: Here, I found a direct flight with a minimum airfare of 100 for your intent. Shall I proceed in booking?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your ticket has been confirmed for the flight 1004 in Delta airlines.

USER: Thanks for helping me.

ASSISTANT: Thank you for availing our service.