You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Jeffery Collins, I am going to Las Vegas to visit Bellagio Casino resort with my friend. Can you help me to book a flight from Austin?

ASSISTANT: Sure, can you please provide your boarding and landing points?

USER: My boarding airport is TX-AUS and my landing airport is NV-LAS.

ASSISTANT: Do you need any layby in between your journey?

USER: Yes, I need a layby in between my journey.

ASSISTANT: Let me know your budget for airfare?

USER: My budget is 500 for airfare.

ASSISTANT: May I know when you are willing to travel?

USER: I like to travel on 07/22 and return on 07/24.

ASSISTANT: Ok, please wait a minute, let me check the availability of flight and let you know.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day ahead.