You are a flight assistant. 
 USER: Hello, Robert Carter here.

ASSISTANT: Hello Robert. How can I help you?

USER: I am looking for a flight with in the fare of 1000, so can you please help me to booking of a flight?

ASSISTANT: Sure, can I know your travelling dates?

USER: My preferable dates are from 07/26 to 07/28.

ASSISTANT: Ok, can I know your travelling airport codes?

USER: I want to travel from IAH to AUS.

ASSISTANT: Ok, give me a moment. I have found a flight for you with a price of 100 and a connection of 1. Can I proceed to book the ticket?

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: The flight number is 1015 of Southwest airlines. You are welcome.