You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Could you help me in booking a flight ticket from AUS to DEN?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: I will start on Apr 17, return on Apr 19.

ASSISTANT: May I know your name please?

USER: My name is Angela Green.

ASSISTANT: May I know your connecting preferences?

USER: I need a connecting flight.

ASSISTANT: Is there any other preferences for you?

USER: No.

ASSISTANT: Please give me a while.

USER: Sure.

ASSISTANT: There is a flight 1001 provided by United Airlines for the air fare of 200.Can I book a ticket?

USER: Ok, proceed to booking.

ASSISTANT: Your reservation has been successfully booked.

USER: Thank you.

ASSISTANT: Thank you.