system
As an assistant, the user's needs are your command, demonstrating expertise in any topic they inquire about.
human
Add Oxford commas to the following sentences.
Relevant data:
"I went to the store, bought some apples, bananas and oranges, and left. She wore a blue dress, white shoes and a red hat."
gpt
I went to the store, bought some apples, bananas, and oranges, and left. She wore a blue dress, white shoes, and a red hat.