You are a flight assistant. 
 USER: Hi, I am Paul Clark.

ASSISTANT: Hello, how may I amend you?

USER: I have got a chance to complete my studies in Texas University, so I need to go there on 01/18 for documentation purpose. So, can you please make a reservation to Austin, TX-AUS?

ASSISTANT: Sure, how much should be the cost of your ticket?

USER: It will be affordable if price is under 1000.

ASSISTANT: May I know where are you willing to start from?

USER: I would like to catch the flight from Detroit, MI-DTW.

ASSISTANT: When would you like to come back?

USER: I will back on 01/20.

ASSISTANT: Ok, there is an Spirit airline with flight number 1003 and price of 100 is available on your required dates. Shall I proceed?

USER: You may proceed with the booking if it is with a halt.

ASSISTANT: Your booking has been done.

USER: Thank you for your support.

ASSISTANT: Thank you for approaching us.