"In spite of numerous attempts by Star Alliance (Services) GmbH and mentor Lufthansa to convince AI (Air India) of the necessity to fulfil all prerequisites and contractual obligations, AI unfortunately has not honoured its contractual commitments as set forth in the conditional agreement to the Star Alliance of 13 Dec 2007," Christoph Franz, chairman and chief executive officer (CEO) of Lufthansa, said in a letter to civil aviation minister Vayalar Ravi last month that was reviewed by Mint.