system
surprised: My coworkers threw me a welcome-back party without telling me.
gpt
My coworkers threw me a welcome-back party when I returned from maternity leave. 
human
That is so nice!  Did you get lots of presents?
gpt
Yes, they got me a coffee mug and some baby clothes. It was a nice surprise! 
human
So fun.  Did you have your baby? Congratulations on your pregnancy!