Descending from FL 70 to FL 50, Lose Contact with Approach

3 turns, word for word from the oral. Read the pilot lines out loud.

The exchange

3 turns in order

You, the pilot

Delhi Tower IFLY 160 Heavy, negative contact with Delhi Approach, passing FL 70 for FL 50

ATC

IFLY 160 Heavy Delhi Tower, maintain this frequency, cleared to DPN for ILS approach, descend to 3500, report reaching VOR

You, the pilot

Maintain this frequency, cleared to DPN for ILS approach, descend to 3500, report reaching VOR IFLY 160