I submitted my abstract (not the full paper) in one of their their upcoming conferences named https://iser.org.in/conf/index.php?id=2372421 (ICOMBE-24) Which will be held on Dhaka ,Bangladesh according to their website .But they sent me an acceptance email of my paper and asked me to register .My question is should i register before submitting my full paper ?Is it even possible to be accepted for conferrence just by submitting the abstract?