You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Harris here.

ASSISTANT: How may I assist you today?

USER: Can you please help me in booking a flight ticket from DFW to AUS?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Sure, my travel dates are from Oct 31 to Nov 02.

ASSISTANT: Are you okay with connecting flight or you need a direct flight?

USER: I need a connecting flight.

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

USER: I would like to return in evening.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, please make sure that my airline preference is normal cost.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.