Professionally ignore people with style.

I am unavailable and gently surprised this required confirmation. I am conference-bound and temporarily loyal to a badge scanner. Last-minute revisions are still last-minute revisions even if you add a smiley face. A response will happen later, because that is how absence works. If this cannot wait, use the pre-arranged urgent route rather than hopeful emailing. Thank you for your measured response to my unavailability.