Isabelle sighs, and while it's soft, there's frustration in it. She's getting really sick of not getting any useful answers. Of course, she supposes she can't expect a bunch of mundanes to know something useful. She needs to talk to someone from the Shadow World. Another Shadowhunter, preferably, but she'd settle for a warlock or a member of the fey.

Mundanes are most likely to know about magic users than anything else. She turns on her heel, facing him, but continuing to walk backwards. "Are there any magic users around? No offense, but a warlock might be able to help me out a little better."