“…State-of-the-art AI and Natural Language Processing (NLP)-boosted conversational assistants can automatically sustain dialogues with end users [ 9 , 10 , 11 ]. Nowadays, chatbots are commonly applied to management [ 12 , 13 , 14 ], education [ 15 , 16 , 17 ] and healthcare [ 18 , 19 , 20 ]. It has been demonstrated that they perform better when designed on purpose for specific domains and user groups, and when their utterances are short and accurate within those domains.…”