New Delhi, Dec. 8 -- The Directorate General of Civil Aviation (DGCA) has confirmed receipt of IndiGo's response to the show-cause notice issued to CEO Pieter Elbers and Accountable Manager Isidro Porqueras following widespread flight cancellations

The aviation safety regulator received the airline's response, which was submitted after the initial 24-hour deadline was extended to Monday, 6 PM, at the airline's request.

The regulator noted that IndiGo is "profusely apologetic" and expresses deep regret for the inconvenience and hardship caused to customers.

It is currently examining the response and has stated that "enforcement action, as deemed appropriate, will be taken in due course."

In its response, IndiGo attributed the mass disr...