A method and system of dynamically generating computerized dialog. Natural language input previously from a user and cognitive context are analyzed. A dictionary is selected as a function of the natural language input and stored information previously known about the user. A corpus including knowledge of the topics of interest is further selected. One or more expressions are extracted from a network accessible data source. The one or more expressions extracted from the network accessible data source are filtered through the dictionary and the corpus. Dialog is generated in response to the natural language input, as a function of the cognitive context and topic of interest by integrating the one or more expressions filtered through the dictionary and corpus.