"Of course I am," Aziraphale replies, as if it's the most obvious thing in the world. "Why wouldn't I be? Have I given you the impression that I don't care about your well-being?"

Now there are two confused angels. Perhaps discussing this in person is the better choice. "I'm in my bookshop currently, but I just closed shop. You can come here, or I can meet you somewhere, whichever you prefer."