Delegates

Mark and I have been asked to be delegates at this weekend's convention to cast votes for our candidate in the Republican primaries. I'm really interested in this, but I cannot find good information on what we are supposed to do. I know we are supposed to vote, but are we supposed to vote for the guy that has the majority of the state, the guy that most people in our district voted for, or the guy we personally like best? The lady who signed us up indicated we vote for whoever we want, but I want to do what I'm supposed to do and if that means voting for the majority winner from the district I'm representing, I will. I just don't know WHAT I'm supposed to do. The news has been talking about delegates, super-delegates, and how they will decide the race this year for the primaries. That makes me feel like my job may be really important, but when I look for more informtion, there is nothing. I hate feeling so uninformed, I guess I need to do some more research.