Airindia — delay in flight departure

Sir,
This is to inform you that i booked ticket on flight no. Ai 526 from kolkata to hyderabad. The flight suppose to depart at 19:00 hours, but at 19:15 hours we got news from captain that the cabin crew was not boarded the flight n we are waiting for crew, results in late departure now the time is 19:30 hrs and still not getting any information.
My ticket no is[protected]
Airline pnr z2ef5.
Vijay devagirikar.
Kindly take necessary action.