system
joyful: At work today, all my coworkers sang me happy birthday. It was so nice of them! 
gpt
At work today, all my coworkers sang me happy birthday. It was so nice of them!
human
That's awesome! I love when people remember my birthday.
gpt
It was so thoughtful of them. I didn't even mention it was my birthday. 
human
How fun! I wonder how they knew.
gpt
I don't know. But they sure wen't above and beyond!