chat_history: ['So all my friends went on vacation last week :(', "Judging by the :(, I'm assuming you didn't get to join them?", "Yeah, we were supposed to go but I couldn't get off work. I got to see all the pictures on Facebook though, ha! So envious."]
sys_response: I would be envious too.  Perhaps next time you can go somewhere and return the feeling :D
situation: All of my friends went on vacation last week and I couldn't go because of work. I was green with envy when I saw all the pictures.