history: I promised my friend to pick her up after work but I totally forgot. I just left her at work and now I feel like I let her down immensely. I promised my friend to pick her up after work but I totally forgot. I just left her at work and now I feel like I let her down immensely. She was probably disappointed at you.
current: Yeah I know she was. I texted/called her trying to explain to her I forgot and she completely ignored me.
next: Are you upset about this? I'd try meeting hr in person