When you click on help, you get an empty window. I propose to display a default message like this:
'Welcome to the help channel. Here you can ask for help regarding gameplay. Try to explain your problems as specifically as possible.'
When no advisor is logged in, an addidional line should be displayed:
'Sorry, currently no advisor is here to help you at the moment. Be patient and ask again later.'
I don't know how diffcult it is, but maybe it is a good idea to display the number of advisors when typing for the first time in help channel and update it everytime an advisor logs in/out.