On Alisa, Yandex's machine learning-powered virtual assistant:

An early version that used Russian literary classics as a training data set was scrapped because it was so depressing, says Mr Parakhin. "You had the feeling that after it stops talking it'll go and commit suicide!" But a revamped model will launch in October, voiced by the actress who dubbed the Russian version of "Her" in Spike Jonze's hit film.

https://www.economist.com/news/business/21729779-search-giant-thriving-faces-political-pressures-yandex-russias-biggest-technology

(Never use it, but I doubt the re-do is for the better.)