You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I want to meet my Facebook friend, so I need to book a flight ticket.

ASSISTANT: Sure, can you share your journey details?

USER: My schedule dates are from 09/15 and 09/17.

ASSISTANT: OK, may I know your name please?

USER: My origin airport is Washington, DC-IAD and destination airport is Chicago, IL-ORD. My name is Donald Clark.

ASSISTANT: OK, please give me a moment I will check the availability and get back you.

USER: OK,.

ASSISTANT: Thanks for your waiting, I found a flight matching your requirements.

USER: Can please provide me flight details?

ASSISTANT: The flight details are as follows, airline : SouthWest, flight number : 1018 and price of 100. Shall I proceed with this booking?

USER: OK, you can.

ASSISTANT: Thank you, the flight has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.