I think SMS works for those use cases as a one way notification, and no further interaction is usually needed. Here in the US my doctor's office sends me an au

I think SMS works for those use cases as a one way notification, and no further interaction is usually needed. Here in the US my doctor's office sends me an automated reminder SMS before appointments, and the functionality is limited to replying yes or no to confirm. For the use case it has, it works fine.