Teachers and administrators can choose whether they want to have 1 way or 2 way communication in Remind. Other class owners like parents or students can't change their message settings, two-way conversations is the only option.
You're account is set with two-way communications enabled but you can change this account level setting if needed. Follow the steps below to for the specific device you're using to access your Remind account:
You might need to scroll down till you see Message Settings. From there, simply uncheck the box that says Allow replies to your message for 1 way communications with Remind.
View from your account on the web