Last year I suffered because of last minute cancellation by Air Costa. It is very sad that still they are continuing with that. Please avoid AIr Costa. Please dont get attracted by low price, because you may have to pay 10, 000 extra to another airline on the day of travelling.
rate of cancellations are very high. As per https://dgca.nic.in/reports/Traffic-ind.htm during Jan, 2016 the cancellation rate was about 12%.