Uh, because I'm not Joy.
4 seconds sound clip from the Inside Out (2015) movie soundboard.
You can hear this line at 00:27:33 in the Blu-ray version of the movie.
Quote context
[...]
- Hockey?
- Guys, this is... You pretend to be Joy.
- Won't it be great to be back out on the ice?
- Oh, yeah, that sounds fantastic.
- What was that? That wasn't anything like Joy!
- Did you guys pick up on that?
- Mmm-hmm.
[...]