"What are you waiting for?" Michael couldn't even imagine what Duma could be waiting for. Clearly something had happened, though. He couldn't pretend to know anything of the other angel's life any more than he could expect Duma to know of his own experiences. It could be argued that it was the sort of thing to discuss, but he wasn't sure about how much was acceptable.
"Banished?" The term itself was somewhat unfamiliar, yet, it was easy enough to assume what Duma meant. "Why would you be banished?" Of course, God had banished all of the angels that Michael knew of before leaving, but they had sided with Gabriel, and well. Their Father was still upset, despite restoring Michael's wings.