Create two new variables that have the messages missing

Hey I got a code that compares two strings and makes an output that has the messages that are repeteated in both strings, but I want to create two new outputs for the messages that are not in the output but they are in the two strings from the beggining. The code is:

AIS1(strlength(AIS1) < 15) = [];
AIS2(strlength(AIS2) < 15) = [];
N=size(AIS1,1); %% Importante detras que sino daba error el codigo
msg_AIS1 = regexp(AIS1, '.*(?=\d{4}$)', 'match', 'once'); % todo el mensaje menos las ultimas 4 cifras
msg_AIS2 = regexp(AIS2, '.*(?=\d{4}$)', 'match', 'once');

t1 = regexp(AIS1, '\d{4}$', 'match', 'once'); % sacar ultimas 4 cifras
t2 = regexp(AIS2, '\d{4}$', 'match', 'once');

Time_AIS1 = duration(strcat('00:',extractBefore(t1,3),':',extractAfter(t1,2))); % Poner en formato hh:mm:ss
Time_AIS1 = Time_AIS1+hours(cumsum([0;diff(Time_AIS1)<0])); %añadir una unidad en hh cada vez que se reinicia mm:ss
Time_AIS2 = duration(strcat('00:',extractBefore(t2,3),':',extractAfter(t2,2)));
Time_AIS2 = Time_AIS2+hours(cumsum([0;diff(Time_AIS2)<0]));

mask1 = ismissing(msg_AIS1) | ismissing(Time_AIS1);
mask2 = ismissing(msg_AIS2) | ismissing(Time_AIS2);

origi_AIS1 = (1:length(msg_AIS1));
origi_AIS2 = (1:length(msg_AIS2));

msg_AIS1(mask1) = []; Time_AIS1(mask1) = []; origi_AIS1(mask1) = [];
msg_AIS2(mask2) = []; Time_AIS2(mask2) = []; origi_AIS2(mask2) = [];


[H1, M1, S1] = hms(Time_AIS1); % Dar tiempo en 2 variables, utilizar M1 para crear rangos
[H2, M2, S2] = hms(Time_AIS2);  
msg_match = cell(N, 1);
msg_NoMatch_AIS1 = cell(N,1);
msg_NoMatch_AIS2 = cell(N,1);
for K = 1:1:N
   all_match_AIS = find(msg_AIS1(K) == msg_AIS2); % encontrar mensajes iguales
   if isempty(all_match_AIS) %fprintf para escribir datos en un archivo de texto
%        fprintf('No hay coincidencias para la linia #%d -> "%s"\n', origi_AIS1(K), msg_AIS1(K)); % '%s' para un string
       continue;
   end
%    fprintf('potencial coincidencia #%d -> "%s", checking times\n', origi_AIS1(K), msg_AIS1(K));
%    disp(K), disp(all_match_AIS)
   if H1(K)== H2(all_match_AIS)
   % crear rango de coincidencia de minutos
      complete_match_AIS = all_match_AIS(M1(K) == M2(all_match_AIS) | M1(K) == M2(all_match_AIS) - 1 | M1(K) == M2(all_match_AIS) + 1);% Rango creado +-1 minuto de cada mensaje
      msg_match{K} = msg_AIS1(complete_match_AIS); %coger los mensajes de las lineas que han coincidido. IMPORTANTE
   end 
 if isempty(complete_match_AIS)
%         fprintf('line %#d -> "%s" coincide texto pero no tiempo\n', origi_AIS1(K), msg_AIS1(K));
     else
%        fprintf ('line %#d -> "%s" coincide tambien el tiempo. Los resultados son:\n', origi_AIS1(K), msg_AIS1(K));
        msg_AIS2(complete_match_AIS) %IMPORTANTE
        
 end

end
 %# encontrar celdas vacias (creacion de la variable)
emptyCells = cellfun(@isempty,msg_match);

%# quitar las celdas vacias
msg_match(emptyCells) = [];

% Quitar los strings de dentro de la cell (cat)--> para concadenar
Matching_msg = cellstr(cat(1, msg_match{:}));


Matching_msg = string(Matching_msg);

As you can see the messages that are in both strings (msg_AIS1 and msg_AIS2) go to msg_match. What I want to create is variable msg_NoMatch_AIS1 and msg_NoMatch_AIS2 that have the missing msg from msg_AIS1 and msg_AIS2 that are not in msg_match