You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Larry Harris. I want to book a flight ticket from DTW to ORD. Could you help me in booking?

ASSISTANT: Sure, I am happy to help you with that.  Can I have your travel dates please?

USER: My travelling dates are from June 26-28.

ASSISTANT: Ok, please let me know your airlines preference.

USER: I prefer for normal-cost airline.

ASSISTANT: Do you have any other specifications?

USER: I need connecting flight.

ASSISTANT: Sorry Larry Harris, no flight is available to you on your dates.

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you.