Intelligent Virtual Assistant Market Size, Share & Trends Analysis Report By Product (Chatbots, Smart Speakers), By Technology (Text-to-Speech, Speech Recognition, Text-Based), By Industry Vertical (Best, IT and Telecommunications, Defense and Government, Retail, Healthcare, Travelling and Hospitality, Automotive, Media and Entertainment, Others) and By Region(North America, Europe, APAC, Middle East and Africa, LATAM) Forecasts, 2025-2033