You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER:  I am Jerry Adams want to travel to CO-DEN to attend Halloween festival from TX-AUS. Can you book a direct flight?

ASSISTANT: Sure, could you forward your departure and arrival dates?

USER: My travel dates are 01/16 and 01/18.

ASSISTANT: May I know your price limit?

USER: I can afford 500.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: We found a flight on southwest airline, flight number as 1000 with the fare of 100. Can I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER:  Thank you for booking.

ASSISTANT: Thank you.