Chat style instruction form

(view @2x)
For a drop-off laundry service app:

Instead of a form input field, i thought of using a chat interaction for leaving special laundry instructions. The upside is that this makes perfect sense for subsequent correspondence with the laundry vendor.

Leaving instructions is optional. So top right button says "No instructions" until user sends an instruction message, then it changes to "Next" for next step in order flow.