Indra had received tickets from u and had signed in invoice and stated to have received the tickets, but on the contrary he had issued cheques in the name of Halena. You should have given attention at the time of receiving the cheque. The ticket holder cant not issue cheque in the name of another person, all u have to do is to initiate a case u/s 415/420/406 IPC against that holder and claim of the amount.