NEW YORK (Reuters) – U.S. television talk show host Katie Couric, whose first husband died of cancer in 1998, is engaged to Chicago banker John Molner, her spokesman said on Tuesday. Couric, 56, accepted after Molner, 50, proposed during the weekend. They have been dating for about two years. "I can confirm that she is engaged," Couric's spokesman Matthew Hiltzik said in an email. Couric has two daughters with Jay Monahan, who died from colon cancer. She launched her daytime TV talk show "Katie" in 2012, more than a year after the end of a stint as the first woman solo anchor of a U.S. …