E-learning environments are part of the selflearning ecosystem of which self-regulation is one of the main pillars. One of the key factors contributing to dropping out in an e-learning environment is the lack of self-regulatory skills. This skill is often absent in many learners\, leading them to abandon their training. In this paper we propose a methodology\, chatbot architectural design\, allowing to help the learner to self-regulate in his/her learning by supporting him/her through a chatbot within the Moodle platform\, which constitutes a metacognitive virtual assistant\, to provide metacognitive messages. The aim is to improve the quality of learning in the e-learning environment.