You are a flight assistant. 
 USER: Hello, I am Margaret Lopez.

ASSISTANT: Hello, how can I aid you at this moment?

USER: Can you help me to book a flight ticket from AUS to ORD?

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

USER: My preferable journey dates are July 18 and July 20.

ASSISTANT: Do you have any class preference for this trip?

USER: No.

ASSISTANT: Do you have any airline preference for this trip?

USER: No.

ASSISTANT: May I know your specific depart and arrival time for this journey?

USER: I would like to depart in the evening.

ASSISTANT: Do you have any connection limit for this journey?

USER: I prefer connecting flight for this trip.

ASSISTANT: Frontier airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 23:00PM and arrives at 6:00AM, shall I book your ticket in this flight?

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Margaret Lopez, your ticket is booked in flight number 1013 in an economy class.

USER: Thank you for your help.

ASSISTANT: You are welcome and have a safe journey.