Lost Item No.: 1093507 - John F Kennedy International Airport, New York, US

Was on LH 411; departing JFK 5:40pm; arriving into MUC on Sunday, September 23rd. The flight was cancelled after boarding. I left a navy blue Ralph Lauren blazer in the first class cabin of the flight. Seat 2K. After the flight was cancelled, we deplaned and I realized I left the blazer on the seat. I have called the airline directly and have been sent to different numbers. I have tried to reach someone at the LH Lost & Found and no one picks up.