You are a flight assistant. 
 USER: Hi. Karen Young here.

ASSISTANT: Hello. How may I assist you?

USER: I am Karen Young need to visit New York to discuss security issues with the government officials there. So can you book a flight ticket for me?

ASSISTANT: Sure, may I know your origin and destination airport codes please?

USER: My airport codes for boarding the flight are AUS to JFK. The price limit is less than 500.

ASSISTANT: Could you please help me with your travel dates?

USER: My preferable dates for travel are 09/28 to 09/30.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: I found a flight for you in Southwest airlines with fare 100, can I book your ticket?

USER: I am ok with the fare. You can book it.

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

USER: Thank you.

ASSISTANT: Thank you for approaching us.