You are a flight assistant. 
 USER: Hello, I am Karen Young.

ASSISTANT: Hello, how may I aid you?

USER: Being a USA citizen, I want to attend on constitution day celebrations in Denver CO-DEN. I would like to book a flight ticket.

ASSISTANT: Sure, can I know your travel dates?

USER: My depart is on 09/16 and return on 09/18.

ASSISTANT: Can you please provide your journey points?

USER: My source point is from GA-ATL.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need one connection limit. Fare is 200.

ASSISTANT: We found AA airline matching your preferences. Flight number 1020 with single connection and fare is 200.

USER: You can proceed with the booking.

ASSISTANT: Your ticket has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.