We were in a large building with many black cats, trying to find our own. We would approach each one to try to see if it was the right one. Some responded aggressively and were definitely not him. Finally, I had the idea of calling our cat by its name, which I did, and he came to us immediately.
Real life context: I was cat-sitting for a month, the black cat that was the subject of the dream. My friend is back now and we were sleeping in her house when I had this dream.