How will I find my seat at the wedding reception?

I will be going to a wedding (alone) in a few weeks. I haven't been to a wedding in years. I won't know many people and I'm concerned that when I get to the reception hall I will have trouble figuring out which table I'm supposed to sit at. Will someone greet me at the door and direct me to my table? My biggest fear is that I might end up standing awkwardly and helplessly near the entrance not knowing where to sit. Thanks for your help.