Professionally ignore people with style.

The timing of your email is spectacularly unfortunate for both of us. I am at a conference collecting badges, lanyards, and secondhand jargon. Please let the team on shift handle the immediate fires, literal or otherwise. I will respond when I return, which is earlier than some expectations deserve. If the issue is urgent, call the venue rather than emailing into the abyss. Your continued patience is doing impressive work.