diff --git a/src/BusProNet/Model/Notification.php b/src/BusProNet/Model/Notification.php
index e54078c..ff342f4 100644
--- a/src/BusProNet/Model/Notification.php
+++ b/src/BusProNet/Model/Notification.php
@@ -13,13 +13,8 @@ class Notification
     public ?int $code;
     public ?string $message;
 
-    public function isSuccessful(): bool
+    public function isError(): bool
     {
-        // Successful responses don't carry codes and messages
-        if (null === $this->code && null === $this->message) {
-            return true;
-        }
-
-        return 650 === $this->code && false === stripos($this->message, 'fehler');
+        return 650 !== $this->code;
     }
 }
diff --git a/src/Controller/Booking/EditController.php b/src/Controller/Booking/EditController.php
index b73cee0..0d8d93a 100644
--- a/src/Controller/Booking/EditController.php
+++ b/src/Controller/Booking/EditController.php
@@ -94,9 +94,13 @@ class EditController extends AbstractController
                 'email' => $bpnUser->getEmail(),
                 'booking_id' => $id,
             ]);
-            if ($response instanceof Notification && false === $response->isSuccessful()) {
-                $this->addFlash('error', $response->message);
-                $this->logger->error('Error initiating booking update', [
+            if ($response instanceof Notification) {
+                if (true === $response->isError()) {
+                    $this->addFlash('error', $response->message);
+                } else {
+                    $this->addFlash('info', $response->message);
+                }
+                $this->logger->error('Booking update not successful', [
                     'email' => $bpnUser->getEmail(),
                     'booking_id' => $id,
                     'message' => $response->message,
diff --git a/src/Controller/RegistrationController.php b/src/Controller/RegistrationController.php
index 8cd64a5..9e2e6f0 100644
--- a/src/Controller/RegistrationController.php
+++ b/src/Controller/RegistrationController.php
@@ -34,10 +34,10 @@ class RegistrationController extends AbstractController
         if ($form->isSubmitted() && $form->isValid()) {
             try {
                 $response = $this->apiClient->register($registrationData);
-                if ($response->isSuccessful()) {
-                    $this->addFlash('success', 'Du erhältst in Kürze eine E-Mail mit einem Link zum (Zurück)setzen deines Passworts.');
-                } else {
+                if (true === $response->isError()) {
                     $this->addFlash('error', 'Möglicherweise bist du bereits registriert. Bitte setze dein Passwort zurück.');
+                } else {
+                    $this->addFlash('success', 'Du erhältst in Kürze eine E-Mail mit einem Link zum (Zurück)setzen deines Passworts.');
                 }
                 $this->logger->info('Initiated registration', [
                     'email' => $registrationData->email,
@@ -57,4 +57,4 @@ class RegistrationController extends AbstractController
             'form' => $form->createView(),
         ]);
     }
-}
\ No newline at end of file
+}