You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: My name Paul Martinez, I want to book a direct flight from Houston to spend my holidays at Dallas.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I will fly on Dec 6 and return on Dec 8.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My source airport code is HOU and my destination code is DFW.

ASSISTANT: I found Spirit airline is available on your dates which matches your essentials and it costs you only 100.

USER: Please proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing.