Search and knowledge base question answering for a voice user interface

A system comprising:

• at least one processor;
• and
• at least one memory comprising instructions that, when executed by the at least one processor, cause the system to:
• receive first data corresponding to a natural language input user query;
• process the first data using at least one machine learning model to determine model output data;
• determine, based at least in part on the model output data, to perform a search corresponding to the natural language input user query;
• send data representing the natural language input user query to a search component;
• receive, from the search component, response data;
• and
• cause an output using the response data.