You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from DEN to ATL?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: My trip dates are May 28 and May 30 respectively.

ASSISTANT: Is there any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: No other preferences.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: Ronald Carter here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.