system
sad: My border collie had to be put down due to a neurological disorder that could not be treated.
gpt
It is so difficult to have a pet pass away, I really miss him.
human
Aw I understand that, I have gone through that myself and it's very hard. When did this happen? 
gpt
Over the summer, he started acting strange so we took him in for testing.
human
Oh no I'm very sorry. What kind of pet? 
gpt
A border collie, he was a great doggie.