One ready-made excuse

Take this and vanish gracefully.

This note confirms that I am not presently available. I am on a break and treating my email like a distant rumor. Please assume all non-emergency alignment can survive my absence. Responses will resume after my return. If this truly cannot wait, please contact the assigned backup. Thank you for your consideration.

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