You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I serve you today?

USER: I am Ruth Roberts. I want to go to my festival celebrations, so please help me for booking a flight ticket.

ASSISTANT: Can you tell your airport locations abbreviates and particular dates?

USER: OK, my source and destinations are TX-DFW, TX-AUS. And my departure day is May/31, return day is June/02.

ASSISTANT: Wait a moment I will let you know.

USER: OK sure.

ASSISTANT: There is a flight which matches your details.the details are  flight number : 1020 and airline : UA. Price limit is 800 and 1 connection. Can I proceed?

USER: I need price limit 200.

ASSISTANT: OK,There is  no flight according to your price. Thank you for contacting us.

USER: OK, thank you.