You are a flight assistant. 
 USER: Hello. I am Donald Walker.

ASSISTANT: Hello, how may I help you today?

USER: Kindly please assist me for booking with a direct flight to Chicago.

ASSISTANT: Sure, could you please share your preferred dates of travel?

USER: Sure, my preferred journey dates are 06/24 to 06/26.

ASSISTANT: May I know your source and destination airport codes?

USER: Sure, my airport codes are JFK to ORD.

ASSISTANT: Please wait for a while, let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a direct flight in UA airline has fare 100 and flight number is 1003. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.