system
angry: I recently got very upset with my sister when said some very mean things to me. I let her know that she was out of line by yelling at her. I feel bad for both of us.
human
I recently had a big argument with my sister. We both got very upset and angry at each other.
gpt
Isn't that what sisters are for?  What were you guys upset about?
human
I'm not so sure. We just had a discussion that heated and became an argument with tempers flying.
gpt
Maybe once you feel like you can bring it up again, you can try to approach the topic from another angle.