Good idea, and one that should really hit home.
The experience felt tightly scripted to me, and if that’s the design, I think picking from offered replies would work better than typing freely - writing my own words kept making me test whether the game cared what I said, and it mostly doesn’t. A set of choices would carry the same weight without that doubt. (The reaction to my typo was a lovely detail, though.)
Nice work on the atmosphere.