Evaluating Conversational Agents with Persona-driven User Simulations based on Large Language Models: A Sales Bot Case Study. - Justyna Gromada; Alicja Kasicka; Ewa Komkowska; Lukasz Krajewski; Natalia Krawczyk; Morgan Veyret; Bartosz Przybyl; Lina Maria Rojas-Barahona; Michal Szczerbak (EMNLP (Industry Track), 2025)