Both Google-owner Alphabet GOOGL.O and Microsoft MSFT.O are due on Tuesday. By Laura Matthews NEW YORK, July 25 (Reuters) - The dollar was flat against a basket of its major peers on Tuesday, as investors hope a trio of central bank meetings this week will provide guidance on the outlook for monetary policy. U.S. consumer confidence increased to a two-year high in July amid a persistently tight labor market and receding inflation, bolstering the economy's prospects in the near term.