Gnatyuk, V., Batrak, O., Skurativskyi, A. and Kudrenko, S. 2023. Optimization method for mass service system with the use of a virtual assistant based on artificial intelligence. Problems of Informatization and Management. 3, 75 (Nov. 2023), 21–28. DOI:https://doi.org/10.18372/2073-4751.75.18013.