You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Karen King.

ASSISTANT: How can I assist you?

USER: I have a business meeting in Chicago, can you help me for booking a flight ticket?

ASSISTANT: Sure, please share your travel dates.

USER: My travelling dates are from 01/23 till 01/25.

ASSISTANT: Can I know your airport codes?

USER: My travelling airport codes are from DTW to ORD.

ASSISTANT: Th flight 1020 of AA airlines is available on your requested dates with a price of 200. Shall I proceed?

USER: I need a direct flight. Can you help me with that?

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.