What does the "Find a Time" button do on missed calls and call requests?

Popcall is made for instant communication, but we know creators and users aren't always available to hop on a call immediately.

To help users and creators find a mutually good time for a call, the "Find a Time" button lets users send and receive free messages so they can coordinate.

These messages are meant just for finding a time to talk without charging users for extra messages.