Starbucks said Friday it’s committed to bargaining with its unionized workers and reaching labor agreements next year, a major reversal for the coffee chain after two years fighting the unionization of its U.S. stores. In a letter to Lynne Fox, the president of the Workers United union, Starbucks Chief Partner Officer Sara Kelly said the current bargaining impasse between the two sides “should not be acceptable to either of us.” In a statement distributed by Workers United, Fox said she is reviewing the letter and will respond.