The provider will almost certainly provide one.  But ultimately, YOU are responsible for protecting yourself, so you have to be prepared for the unlikely possibility that she has forgotten or has run out.

So: bring one, even though you probably won't use it.

Unlike Slimroot, I have run across ladies who did not provide them. Bring your own, just in case (visualize driving to a drugstore halfway through the date.)

Sometimes I've had trouble "fitting" a large guy and had to try 2-3 different large sizes before one felt comfortable. This interrrupted the flow, of course.

So, if you are one of those guys, bring your own and give it to her as soon as you head in the bedroom.