A computer-implemented method and an apparatus manage natural language queries of customers. A natural language query provided by a customer on an enterprise interaction channel is received. The natural language query is analyzed to determine if an answer to the natural language query exists in at least one question-answer (QA) domain from among a plurality of QA domains by analyzing each QA domain from among the plurality of QA domains using a multi-level framework of natural language models. An answer to the natural language query is provided to the customer on the enterprise interaction channel if such an answer in available in the plurality of QA domains. If an answer is not available, then an appropriate response is provided to the customer to assist the customer.