Board Thread:General Discussion/@comment-4504826-20160419213859/@comment-32182236-20170925221755

...How could I have forgotten Flowey's final speech? Well, here we go.

"Well, that's all. See you later..."

He doesn't use Chara's name, but he does acknowledge the one he's speaking to as separate from Frisk, begging you not to reset. It WOULD be kind of weird, since Chara's name is "Frisk" in Hard Mode.. Then there'd be two Frisks..