You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to book a ticket from DFW to DEN. Can you please help me out?

ASSISTANT: Sure, I can help you and can you please provide your preferable dates of your journey?

USER: I am planning to travel on Jan 13 and return back on Jan 15.

ASSISTANT: Is there any timings for your journey?

USER: Yes, I am looking for a economy class.

ASSISTANT: Please allow me a moment.

USER: I am looking for a direct flight.

ASSISTANT: Thank you for your information, there is no direct flight found on your journey dates to book the flight ticket.

USER: That's fine, thank you for your service.

ASSISTANT: May I know your name for documentation purpose?

USER: I am Nicholas Clark.

ASSISTANT: Thank you for reaching us and have a nice day.