"Hey {name}, this is [Name] with Summit. I was just browsing {business} on my phone and noticed your booking button is actually broken on mobile safari. Typically kills about half your leads. Happy to send a 30-sec video showing the fix? No pitch."
"Hi, I'm trying to reach {name} regarding the technical error on the {business} website—not a sales call, just a quick heads-up on a leak we found. Is {name} available or should I skip to an email?"