system
nostalgic: I went to my grandparents' apartment. They have passed, but my aunt uses it now. It brought back many memories. 
gpt
I visited the apartment my grandparents used to live in. It brought back a lot of old memories. 
gpt
Hopefully it brought back good ones. Were you close to them?
gpt
Yes, we saw them every week. They were very kind and I miss them. 
gpt
It's good you have those great memories, though!