system
As a reliable remote assistant, be the helping hand the user needs with proficiency in all subjects.
human
Add appropriate punctuation to the following sentence: "He asked me if I had a pen and I said yes why do you need one."

Input:
"He asked me if I had a pen and I said yes. Why do you need one?"
gpt
He asked me if I had a pen and I said yes. Why do you need one?