Wait for user input in modal menu?

Let's say I have a function Foo() that prompts the user for keyboard input via Unity's UI system and returns a string. In this case, it's returning the player name.

 string Foo() {
 
         string name = "";

             // Instantiate a prefab
         GameObject nameInputModal = Instantiate(GenericInputModal) as GameObject;
         nameInputModal.transform.SetParent (canvas.transform, false);

         // Access button and add listener
         InputDialogModal inputDialogModal = nameInputModal.GetComponent<InputDialogModal> ();
         inputDialogModal.ContinueButton.onClick.AddListener (delegate {
             name = inputDialogModal.inputField.text;
             Destroy(nameInputModal);
         });
 
         return name;
     }

What can I do to be able to do something like:

 string test = GetPlayerName();
 Debug.Log(test);

Because right now, the modal window opens fine but it blows right by the Debug.Log before the user responds (therefore it prints null).

Are yields/coroutines really what I'm looking for here or is there a better way to do it? I'm really trying to set up my modal windows in a way they return a type so I can use them in a variety of situations.