You are a flight assistant. 
 USER: Hello, I am George Young.

ASSISTANT: Hello. How may I serve you today?

USER: I need to attend a workshop in university of Texas on 06/18. Please book me a ticket from 06/17 to 06/19.

ASSISTANT: Sure, kindly share the price limit.

USER: I can pay up to 500.

ASSISTANT: Could you please let me know your source and destination?

USER: My origin is MI - DTW and destination is TX - AUS.

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

USER: Yes I need a break in between.

ASSISTANT: Thanks for giving the details, please wait a moment I will check and get back to you.

USER: Ok.

ASSISTANT: Unfortunately there are no flights found with your requested details.

USER: That's Ok.

ASSISTANT: Thanks for opting us, have a nice day.

USER: Thanks for your help.