We're not a typical customer — I'm not sure this applies.

"What makes you atypical? I'd rather understand your situation specifically than assume we're a fit or not."

"I hear you — and actually, unusual situations are where I can be most useful. Tell me about your context and let's see if there's a real connection."

"We've seen a lot of 'atypical' situations, and most of them were just different angles on the same problem. Want to stress-test the fit?"