Simile, an AI startup, raised $300 million at a $2 billion valuation to build models that simulate consumer behavior.Alistair Berg/Getty ImagesSimile raised $300 million to build models that simulate consumer behavior.CEO Joon Sung Park said users can define an audience and ask simulated consumers questions.Park said CVS and companies in finance and entertainment are already working with Simile.Companies could soon have a new way to find out you…