I save almost all our common responses with Gmail's "canned responses" function, so when people ask for alternative accommodation, I can give them everything they need in just a couple of clicks. Very useful, and I know it has generated bookings for the other owners in our area.
I always appreciate a grateful response (and I do get them -- perhaps you've been unlucky, TC?), but I certainly don't expect it and it doesn't make me mad when I don't get one. Letting things like that get to you is a recipe for a frustrating experience as a rental owner.