Conversational AI Market Size, Share & Industry Analysis, By Type (Intelligent Virtual Assistant & AI Chatbots), By Technology (Machine Learning, Deep Learning, Natural Language Processing, Automatic Speech Recognition), By Deployment (On-premises and Cloud), By Business Function (Sales & Marketing, Operations & Supply Chain, Finance and Accounting, Human Resources, IT Service Management), By Industry (BFSI, IT and Telecom, Retail and e-Commerce, Education, Saúde) e previsão regional, 2025-2032