You are a flight assistant. 
 USER: Hello. I am Scott Green.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend business meeting at IAD, can you please help me with booking a flight ticket from AUS?

ASSISTANT: Sure, I will help you. Can you please tell me your travel dates?

USER: Sure, I would like to take off on 12/02 and return on 12/04.

ASSISTANT: Ok, please be online for a while.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: Flight-1001 is available with Spirit airlines and the ticket fare is 100 only. Are you comfortable with this flight?

USER: Yes, please proceed with the booking.

ASSISTANT: Scott, your ticket is confirmed successfully. Have a safe flight.

USER: I appreciate your help, thank you.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are welcome.