You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Nelson.

ASSISTANT: How may I assist you today?

USER: I need to book a flight ticket with direct flight, Can you please help me for booking from DFW to CLT?

ASSISTANT: Sure, please provide me your journey dates to search available flight for you.

USER: I would like to travel on 10/05 to 10/07.

ASSISTANT: Wait for a minute, let me check.

USER: Sure.

ASSISTANT: Thanks for your patience, as per your request there is a flight with airline Delta and single over a stop between journey and fare is 200, is it ok for you?

USER: No, don't proceed for booking.

ASSISTANT: Why you need any specification requirements?

USER: I need a direct flight.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry Nelson for this inconvenience, I could not find any direct flight with your travel dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for choosing us, have a great day ahead.