"The situation continues ... there are no talks so far. We have not got any invite from the management side showing their willingness to talk to us," Capt Sam Thomas, Joint General Secretary of National Aviators Guild said.
He claimed that overall 500 pilots have reported sick.
To deal with the situation, the airlines has set up a crisis management centre which is continuously monitoring the situation.
A spokesperson of the airlines said it has cancelled 163 domestic and 35 international flights as 400 of its over 1000 pilots did not report for duty.