Jet Airways — lost my jacket in plane

Address:

New Delhi, Delhi, 110019

To
The ceo/director/manager
Operations
Jetairways

Sir,
Sub: compensation for the monetary losses by jetairways.

I am sunil l, i and my wife had planned for bali trip from 19-02-19 to 26-02-19. Accordingly their ticket was booked by 9w - 16
Jet airways
Economy
11:35 tue 19-feb-2019
New delhi terminal: 3
Delhi indira gandhi
20:00 tue 19-feb-2019
Singapore
Changi intl
5 hr: 55 min
Booked
Refundable
No. Passenger name type ticket / crs pnr
1 mrs neha sajwan adult[protected] / p2t492
Baggage:30k
2 mr sunil kumar adult[protected] / p2t492
Baggage:30k
9 hrs 20 mins layover
Flight departing arriving dur

I lost my jacket which is very costly blue colour under armer brand i lost while catch my flight from delhi igi to singapore. Please refund or check with airport in lost or found admin department.
Blue colour jacket
Ua brand
Full sleeves
And briefcase key also in the pocket
I lost my gifted jacket and spoil our tour how to open the briefcase which needs to be open after departure bali is on 20th feb 2019...

Regards
Sunil kumar
[protected]