As for one (I seem to be the only one) prefer the version of Alphaghetti because it explains her reasons. Personnally, I think we owe our customers great respect and I put myself in her parent's pants, I would love to receive this letter, I would feel respected and understood, and it would also reassure me greatly!

I am not saying you HAVE to explain, I am saying I think this is the humanely thing to do.