Hello, Nicole Hill here.
Hello Nicole, how are you?
I want to travel from ORD to LAS. Will you please help me in booking my ticket?
Sure. May I know your travel dates please?
Sure, my travelling dates are from 01/19 to 01/21. Also check there should be no connection  and the fare should be with in 500.
Sorry, I have not found any flights as per your requirements.
Oh! It's ok. Thank you for your help.
You are welcome.