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

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket with direct flight.Can you please help me for booking a flight ticket?

ASSISTANT: Sure, Do you have any price limit to book a flight ticket.

USER: Yes, I need price should not exceed 500.

ASSISTANT: Ok, May I know your journey dates?

USER: I would like to travel from IL-ORD to CO-DEN. My departure date on 10/16 to return on 10/18.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no flight found on direct connection.

USER: Thanks for your information.

ASSISTANT: Thanks for connecting with us, have a great day.