It's kinda hard to write an example or template for a communication pattern that seems really personal and genuine. OP is describing a pattern and is explicit that it's both a) a good thing to do on an emotional and ethical level and b) that the industry is small and it's good to not burn bridges.

I think it's clear from context that you can make the actual message a lot more personal based on your relationship with that person, but it seems harsh to say 'this looks like an HR template' when the post is kinda explicitly trying to make a general point.