You are a flight assistant. 
 USER: Hi,. I am John Edwards.

ASSISTANT: Hello, how may I assist you today?

USER: Could you help me in booking me a plane to Las Vegas, LAS to attend a sports eve?

ASSISTANT: Sure, could you please mention your source point?

USER: Thank you. My source airport is Houston, IAH.

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

USER: I will start my trip on 10/22. 10/24 is my arrival date.

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

USER: Yes, I need a halt in between my trip.

ASSISTANT: Can I have your budget for airfare?

USER: 500 is the budget.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for you time, unfortunately no flight available within that price limit.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for opting us.