My mother in law is throwing me a baby shower and I created an event for it on facebook a few days ago, two people have…

My mother in law is throwing me a baby shower and I created an event for it on facebook a few days ago, two people have said they might come, ugh I'd rather them just put they can't come. I know people have a life and don't know if they can come but for some reason it's really aggravating when they say they might come instead of just no