This is what I could find. At least all are accurate even if some are still missing. Couldn't find anything before 1974.

Diana in New-York

1976 At the Palace from June 14 to July 6

1978 at Radio City Music Hall October 5, 6, 8, 9, 10, 11, 12
1978 at Radio City Music Hall October 7 at 7:30 and 11:30
1984 at Radio City Music Hall september 19, 20,21, 22, 23, all at 8 and midnight
1984 at Radio City Music Hall september 24
1989 at Radio City Music Hall september 14, 15, 16
1989 at Radio City Music Hall september 17 at 8 and midnight
1991 at Radio City Music Hall september 19, 20, 21
1995 at Radio City Music Hall october 13, 14
2007 at Madison Square Garden Theatre, April 6
2010 at Radio City Music Hall may 19
2014 at Madison Square Garden Theatre, June 21
2016 at Saint Georges Theatre April 12

Diana in Los Angeles

1974 at Universal Amphitheater, July 5 & 7
1976 at the Ahmanson Theater, from Sept. 28 through Oct. 10
1978 at Universal Amphitheater, September 19, 20, 21, 22, 23, 24, 25
1981 at The Forum, February 6
1982 at The Forum October 5
1983 at Universal Amphitheater, September 21, 22, 23, 24, 25, 26
1984 at Universal Amphitheater, August 6, 7, 8, 9, 10, 11, 12.
1987 at Universal Amphitheater July 28, 29, 30, 31
1989 at Universal Amphitheater July 19, 20, 21, 22
1991 at Universal Amphitheater July 25, 26, 27, 28
1995 at Universal Amphitheater September 30 [[more?)
2004 at Pantages Theater November 9
2007 at Gibson Amphitheater [[Universal) November 20
2010 at Nokia Theater, June 9
2012 at Nokia Theater, March 22
2013 at Hollywood Bowl, August 3
2016 at Hollywood Bowl, July 15, 16