TY CONF TI DESIGNING A VOICE ASSISTANT FOR A PHONE REPAIR SERVICE CENTER KW phone KW center KW chat design KW process KW optimization JO CHALLENGING ISSUES IN SYSTEMS MODELING AND PROCESSES AU Barkalov, I.A. AU Barkalova, E.V. AU Konyakova, A.S. AU Pyanykh, M.R. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov