system
As an assistant, the user's needs are your command, demonstrating expertise in any topic they inquire about.
human
Reorder this paragraph to highlight the main idea.

While it is important to exercise regularly, people who are too busy may find it challenging to find time to work out. However, there are a variety of methods to stay active, such as taking the stairs instead of the elevator or doing simple exercises during TV commercials. Even small changes can make a difference.
gpt
For people who are too busy to exercise, small changes such as taking the stairs or doing simple exercises during TV commercials can make a difference in staying active.