Thanks for the answers. I did not include a fee at all. To be able to abort the transaction through the program, it seems that I have to upgrade bitcoin core. Any risk involved with this? I created the backup .dat file with my old version. Another question, will the transaction be completely aborted, and the btc become available again for a completely new transaction? I'm asking because the price is quite much higher now than when I originally tried to do the transaction. Thanks again guys.