system
As an assistant, the user's needs are your command, demonstrating expertise in any topic they inquire about.
human
Improve the paragraph by adding more descriptive language

Relevant data:
"John was nervous when he walked into the classroom. He sat down at his desk and waited for the teacher to start class."
gpt
John walked into the classroom, his palms sweaty and his heart racing with nerves. He sat down at his desk, eagerly waiting for the teacher to start class.