One ready-made excuse

Take this and vanish gracefully.

I am away and operating on a delayed-response model. I am away collecting sunburn, questionable snacks, and plausible deniability. Routine corporate theater is expected to continue in my absence. A reply will follow when normal operations resume. Immediate concerns can be routed to the department lead. Thank you for understanding.

Professionally ignoring you with the help of Half Baked Out of Office
https://ooo.halfbakedidea.ca?ref=copy

Tweak it, steal it, disappear for a while. Leave the breadcrumb if it feels charming.

Keep the same energy

More in this vein

If this one isn't quite it

Other ways to duck out

Pick one for me