Recently, many universities and schools have switched to online teaching due to the COVID-19 pandemic. Distance learning could limit social interaction between teachers and peer-learners. As this may demotivate learners in the long term, better social engagement providing solutions such as Virtual Reality (VR) can be used for teaching and learning. In the field of technology-enhanced learning, research has indicated that using conversational agents to engage learners in one-to-one (student-agent) tutorial dialogues can improve students' comprehension and foster students' engagement and motivation. Such agents try to simulate the behavior of a human instructor or tutor and engage in a discussion with a learner on a series of predefined topics.