chat_history: ['ever feel so full of emotions when looking at old pictures?', 'Yeah.  reminds me of the good old days!', "for me it's when you get more than just nostalgia, when you get sad, happy and sentimental"]
sys_response: Yeah same here.  I remember one time awhile back I took some pictures of when the aliens landed in my backyard.   That was some good times!
situation: old images from the past wall