Well, the flight does seem to exist, all thats missing are the details of the alleged event.
Taken from KLM Website:
10:20 Amsterdam
23:00 Mumbai/Bombay
Delta Air Lines
KL6086
10:20 Amsterdam (Schiphol) - 23:00 Mumbai/Bombay (Chhatrapati Shivaji)
Aircraft type: Airbus A330-200