Conversational AI
The term Conversational AI, shortcut for Conversational Artificial Intelligence is an umbrella term, become spread in recent years, used to define all technologies around speech recognition (ASR), synthetic voice generation (TTS), natural language generation (NLG), dialog management (DM), chatbots, voicebots, multimodal assistants in general.
Not fully sure but the term has been probably "coined" in IBM (Watson) and used at times as synonym of Conversational Computing. TBV.