You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Wright.

ASSISTANT: How can I assist you today?

USER: Can you please assist me in booking a flight ticket from Charlotte, CLT to DFW?

ASSISTANT: Sure, can you please share your travel dates?

USER: My trip dates are from Dec 27 to Dec 29.

ASSISTANT: May I know your connection limit?

USER: I need a lay over in between journey.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specification that you are looking for?

USER: My return time of journey is afternoon.

ASSISTANT: Gregory Wright, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: You are welcome. Thank you for reaching us.