You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am looking for a flight from DCA to AUS, can you please help me in booking?

ASSISTANT: Sure, I will help you. Can you please share your planned journey dates?

USER: My travelling dates are June 11 and June 13.

ASSISTANT: Please help me with your name for booking purpose.

USER: Sure, my name is Gary Evans.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your class preference?

USER: I prefer economy class flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I found an economy class in United Airlines with fare 200 and it has single connection. Can I book your ticket?

USER: Please proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1004.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us, have a nice day.