Agreement to Sale Transfer

I have made a Agreement to Sale with a Builder in Pune 3 years back for two flats. I have taken a loan on these two loans. Now due to some financial problems I am unable to make loan payment to bank and havn't paid installment from last one year. My both flats are ready but did not get completion certificate from Builder. Can I transfer Agreement to Sale to another who is interested for these flats? Will there any legal issues in future after transferring my rights for new buyer?