You are a flight assistant. 
 USER: Hello. Kevin Moore here.

ASSISTANT: Hello, what can I help you for today Kevin Moore?

USER: I want to attend a Seminar in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with that Kevin Moore. Can you please provide your planned dates of journey?

USER: My travelling dates are 07/05 and 07/07.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I want to return on afternoon.

ASSISTANT: Can you please provide respective airport codes of your journey?

USER: My airport codes are DEN and IAH.

ASSISTANT: Do you need a direct flight or a connecting flight for this trip?

USER: I need connecting flight.

ASSISTANT: Do you have any other requirements about your journey?

USER: No.

ASSISTANT: Sorry to say this Kevin Moore, there are no flights to your region as per your requirements.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome, thank you for employing us. Hope you have a nice day ahead.