On letting go

Today at the office I interview two potential sales assistants. The second one passes with flying colors. The first one is a wreck right from the start. This girl is very nervous and scared of me and she can't stop tapping her feet or wringing her hands. She's treating this interview like a cross-examination and her answers come out all wrong and even after I try to put her at her ease she just can't relax. I give her lots of chances because I can see that she's a good person, a person who needs this job, but she doesn't make it. My heart breaks when I tell her that we're done and she can go home. After that I have to let go of another sales assistant, a girl who I know, a girl who spent a whole week sitting beside me while I oriented her on our products and how to sell them. She was supposed to be at the exhibit last Friday and Saturday but she didn't show up and this does not sit well with my boss so he asks me to tell her not to come back. What only I know is that it was my fault, I forgot to text her the schedule on Thursday and only managed to do so on Friday. And then I try to make myself feel better by thinking that I did text her the schedule after all and she still should have showed up on Saturday. And she didn't. And she didn't even reply to my text on Friday. So it's not really my fault. But even as I rationalize my guilt away the fact that I'm doing so is an indictment in itself.