Mental illness, Julie and Tina, strange scene in a hospital

I’m looking for a drama movie. This is the story of a woman whose mother most likely suffers from a severe form of schizophrenia or other mental illness. I remember a scene where the protagonist visits her mother at a facility/hospital with her young daughter, and her mother mistakes her granddaughter for her own child. A line of dialogue stuck in my mind, and it went like this:

-Hi, Mom.

-Tina…

-Mom, I’m Tina. This is Julie.

Thank you in advance.