Trouble Getting a Program to Loop

Hello, I'm currently trying to get some code to Loop But I'm having an issue. As you can see in the code below I'm asking the user if an outputted number matches what it is in the real world. Based on entries they'll get 2 potential options. First if it matches the program will end, next if it doesn't match the program will ask them if they want to enter the real number in again (Y/N) if they answer no the program will end, if they aswer yes I want it to take them back to the beginnning where they are given the option of input a number. Thanks, any help will be appreciated.

str = input('What is the correct value of the lisence plate?   ','s');
if str==noPlate
    disp('Nice, the value entered matches MatLab');
else
    m = input('The entered value does not match MatLab. Would you like to try again? (Y/N)','s');
    if m=='N'
        disp('The End')
        
    elseif m=='Y'
        str = input('What is the correct value of the lisence plate?   ','s')
        if str==noPlate
            disp('Nice, the value entered matches MatLab');
        else
            m = input('The entered value does not match MatLab. Would you like to try again? (Y/N)','s');
            if m=='N'
                disp('The End')
                
            elseif m=='Y'
                return;
            end
        end
        
    end
end

[Walter Roberson]

Please have a look at https://www.mathworks.com/matlabcentral/answers/1660490-how-can-i-rerun-my-code-if-my-given-statement-is-not-followed-by-the-user#answer_906420