You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Karen Jackson.

ASSISTANT: How can I assist you at this moment?

USER: I am looking for a flight from DEN to ATL, can you help me in booking the flight ticket from Denver?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my planned travel dates are Jan 12 and Jan 14.

ASSISTANT: Do you need any halt in this journey?

USER: Yes, I am looking for a connecting flight in an economy class.

ASSISTANT: Do you have any other specification for this trip?

USER: No.

ASSISTANT: Karen Jackson, we regret to inform you that there are no flight services available with your preferences on this route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.