For Case Dismissal

Sir/Mam, 2 years ago my friend and I are studying in college. One day my friend was beaten by some guys. I was with him that time but i don't know or recognize any of them and they did nothing to me. only my friend was beaten. I filed a complaint against unknown because my friend was unconcious at that time he told police some names. We don't know what happened next because our college was over we came home. Now yesterday someone sent me a photo titled 'waadi notice' my name written on it and my college address and old phone number which both are not in use now. It said appear on court on 4jan which passed 15 days ago. My friend who was beaten is not interested in it. Case is under 324 and 506 ipc. I am complaitant not victim. I don't even know the respondents . Agyaat is written on that notice. What should i do now? I do not want to involve in any of type of problem. I want case to be dismissed. They don't have my home address and current phone number. If i did not appear should case automatically get dismissed ? Or it will create a problem in future for me ?