I don't do this often, but on occasion I use a familiar to find someone in order to tell them something. I notice I can never "hear' what the person's reply is. Is this normal, or do I need to do something in order for the communication to be 2-way?
"So, what does that green line on the graph represent?"
"Oh, that's the projection of a hypothetical offspring from a union between Sauron and Cruella de Ville; we use that as a baseline for determining character alignment."