You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Paul Martinez here.

ASSISTANT: How may I guide you Paul?

USER: I have a round trip from Dallas and Fort Worth for a business meeting.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you on that. May I know your preferable dates that you want to travel?

USER: My departure date is 12/06 and return date is 12/08.

ASSISTANT: Could you please provide your nearest airport codes for booking?

USER: My airport codes are from DFW to DFW.

ASSISTANT: Ok Paul, please hold on a moment to check the flights availability.

USER: Ok, make sure my connections limit is 0.

ASSISTANT: Sorry Paul, there are no flights available with connection 0.

USER: So sad for that. Anyway, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Have a good day.