New Delhi, May 19: The Ministry of Civil Aviation (MoCA) has advised top officials of airline companies that the government will be forced to take concrete action if there is an unbridled hike in air fares, especially in the sector where Go First has stopped operation.During a recent meeting of officials with the Ministry of Civil Aviation and the top officials of airline companies, a senior official of MoCA advised the airline companies that the ministry will be forced to take concrete action if there is an unbridled hike in air fares.