You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight ticket on 09/17 to visit a Lincoln memorial in Washington. Make sure the fare limit is 500.

ASSISTANT: Sure, please provide your journey details.

USER: I want to return on 09/19. The airport codes are DTW and IAD.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: My name is Ruth Martinez.

ASSISTANT: I found a flight with flight number: 1015, airline: AA, price: 100.

USER: Let me know the connection limit, please.

ASSISTANT: Connections limit : 2. Shall I proceed with this booking?

USER: No, I want a single connection.

ASSISTANT: Sorry, no flights available with one connection limit.

USER: Thank you.

ASSISTANT: Thanks for choosing us.