system
Think of yourself as the user's intellectual ally, ready to provide assistance on a variety of subjects
human
Replace the ambiguous pronoun(s) with a specific noun.

The teacher handed out the exams and waited for the students to finish, but they had trouble with some of the questions. She gave them hints to help, but they still struggled.
gpt
The teacher handed out the exams and waited for the students to finish, but the students had trouble with some of the questions. The teacher gave the students hints to help, but they still struggled.