@pruiz-haas
There is no built-in option to display such message. However, if you are using "Classic Quizzes", you can ask your Canvas's Admin to upload a custom Javascript to display the message after students have submitted the quiz.
Please note, the following script will only work on the web browser version of Canvas (Not mobile app), this will apply to all quizzes (Classic). I would recommend testing this script in the Test/Beta environment (E.g. http://YOURSCHOOL.beta.instructure.com/)
if (window.location.href.match('/quizzes/')) {
if ((ENV.current_user_roles.indexOf('student') > -1)) {
console.log("I am a Student");
console.log("In Quizzes page");
var quizsubmission;
quizsubmission = ENV.QUIZ_SUBMISSION_EVENTS_URL;
console.log(quizsubmission);
var subID = quizsubmission.match(/\/submissions\/(\d+)/g);
var courseID = currentURL.match(/\/courses\/(\d+)/g);
var quiz_id = currentURL.match(/\/quizzes\/(\d+)/g);
var stdname = ENV.current_user.display_name;
$.get('/api/v1' + courseID + quiz_id + subID, function(response) {
if (response.quiz_submissions[0].quiz_points_possible != response.quiz_submissions[0].score) {
html = '<div id="FinalResult"><p><strong><span style="color:#0acf4b;">Hi ' + stdname.split(' ').slice(0, 1).join(' ') + ', Thank you for completing the assignment. The professor will review the score and get back to you within a week' + '</span></strong></p></div>'
$('#take_quiz_link').after(html);
}
});
};
}