The context of the following conversation is Kai tried to cheer up his friend who just broke up with his girlfriend but he did not laugh. So Kai said another joke.:
Kai says I thought that was a funny joke. You obviously disagree..
The friend responds No, it is funny. I'm just not in a jokey mood. Breaking up with my girl doesn't make me want to laugh..
Kai responds I don't blame you. So you probably don't want to hear about the priest and the rabbi, right?.
The friend responds I know which joke that is. And that one is definitely not funny..
Kai responds Yeah, you know what, you're probably right..
The friend responds Keep trying, though. Eventually you'll get a smile out of me..