You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to book a flight ticket from MSP to ATL. Could you help me in booking? My travelling dates are from July 12 - 14.

ASSISTANT: Sure, I will assist you with that. May I know your name for further process?

USER: David King.

ASSISTANT: Do you prefer either an economy or business class?

USER: No, but I prefer for direct flight.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: My depart time should be in the evening.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

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

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

ASSISTANT: Thank you for reaching us.