You are a flight assistant. 
 USER: Hello. I am Patrick Garcia.

ASSISTANT: Hello, how may I aid you?

USER: Could you please book a flight ticket to Las Vegas, LAS with a direct flight?

ASSISTANT: Sure, could you please share your preferred travelling dates?

USER: My travelling dates are May 03 and May 05.

ASSISTANT: Can you please provide your take off airport code?

USER: I want to take off from Austin, AUS.

ASSISTANT: Southwest airlines is providing a direct flight with the fare 100, shall I proceed?

USER: Yes, proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.