You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: I want to book a ticket from DFW to MCO, can you help me?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My travel dates are Dec 25 and 27.

ASSISTANT: May I know your name to book the flight ticket?

USER: I am Kenneth White.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight in my journey.

ASSISTANT: Any more specifications do you have?

USER: No.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no direct flights are available for your journey with your requested dates of travelling.

USER: No problem, thanks for checking.

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