Any reconciliation definition would be amiss if it did not include the definition of reconcile, or the reestablishment or settlement of an already established issue. The reconciliation definition states to settle, resolve, reestablish, accept or to make consistent or compatible an already established situation.
When necessary, just say you're "sorry" and it'll bring you peace . . . you don't know what you're missing from someone you've mistaken or hurt, and there could be a true friendship waiting to blossom . . . or respect from an acquaintance, worker, anyone . . . life is too short to have regrets or miss good opportunities because your ego gets in the way.