The Christian who isn't interested in converting anyone is going to end up trying to defend his beliefs, and thus end up trying to convert after all. Once he discovers that isn't happening he will have to admit that his beliefs can't be defended and, if he is any kinds of honest, have to abandon them. More likely he will conclude that we are simply too dumb, to set in our evil ways, or too blinded by the world, to understand his "truth" and will go away even more lost in his illusion. Given that he appears to be convinced that a god is actually answering his prayers, I suspect preaching is about to commence, then he will go away with a self-righteous smug.
There really isn't any other way this can go.
There really isn't any other way this can go.