Perhaps we can have more context. How far away is the non-ham? Do they have a ham radio? Anyone can listen to any radio frequency with no license requirement. The communication would be one way to remain in compliance. There is an element of society that proposes to use amateur bands in an emergency without any licensing and, in an emergency, this will be hard to control.
For your non ham, start at the top, cell phone, text, copper line, email, sneakernet. With planning you can establish a two way connection using FRS or GMRS (but not very far). The secret is planning.