You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service your looking for?

USER: I want to travel from DTW to AUS, can you please help me to book my flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: I want to depart on Dec 11 and I will return back on Dec 13.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: Yes, I need a flight having single connection.

ASSISTANT: May I know your class preferences?

USER: No, please make sure that my departure time is in the evening.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Margaret Jackson.

ASSISTANT: We found a Southwest airline and 1010 is flight number with a fare of 100. Shall I proceed?

USER: Yes, please book the ticket for me.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you so much for your help.

ASSISTANT: Thank you for opting us.