You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Myself Kenneth Lewis. I need to schedule my trip to travel Dallas. Can you please help me in reserving the ticket from DEN to DFW?

ASSISTANT: Sure, I can help you with this flight ticket booking.

USER: Thank you very much for quick access.

ASSISTANT: May I know your travelling dates?

USER: I am planning my trip on Jan 17, and again I will return back on Jan 19.

ASSISTANT: Do you have any class preferences?

USER: I am comfort with any class.

ASSISTANT: Do you want a direct flight or connecting flight?

USER: I am flexible with single connection.

ASSISTANT: Do you have any Airline preference?

USER: My depart time is morning.

ASSISTANT: There is no flight on this route as per your details.

USER: Not a big deal, anyway thank you very much for your service.

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