There is no such thing as a free AI service. You'll need to either reinvent the wheel (good luck) or buy a product if you want that kind of functionality. Technically you can probably get away with natural language processing but even those aren't free, at least for good ones.
Nevertheless asking in the Q&A forum for people to run a google search and provide you the information you can get yourself seems a little much. Just google for the very thing you're looking for and follow the results. It'll be faster for you.