Hahaha! The efforts to excuse her behavior are hysterical. Both appointments were confirmed. The first time she emailed after our scheduled time. We set a definite time for the next day. That day she texted just a few minutes before our appointment. Maybe it wasn't technically a NCNS, but no reasonable person could say there is any substantive difference. If you claim that you would not be upset if a client did that to you, you are being profoundly dishonest. Would you be upset if an electrician did that to you? The honest answer is yes.
Clients should be held to the same standard. If a client did this to you you absolutely should call him out for it. It warns other providers and lets clients know that there can be consequences for being a jerk. You really don't do providers a favor by excusing bad behavior.