CyMON-NLU can inform, chat and gather user information using an advanced natural language understanding engine. It combines statistical morphosyntactic disambiguation methods (trigram tagging), a stemming algorithm and a robust parser for a large semantic grammar implemented in an XML formalism. The scalable CyMON-NLU engine is implemented in C++ and provides interfaces to the agent-based CRM platform CyMON. Further features include automatic language detection and dialog tracking using a semantic network interface. A development kit enables language engineers to easily create semantic grammars for the specific domain.