diff --git a/public/typo3conf/ext/ep_theme/Resources/Private/Forms/ContactForm.form.yaml b/public/typo3conf/ext/ep_theme/Resources/Private/Forms/ContactForm.form.yaml
index a9394c68..3a0ec95b 100644
--- a/public/typo3conf/ext/ep_theme/Resources/Private/Forms/ContactForm.form.yaml
+++ b/public/typo3conf/ext/ep_theme/Resources/Private/Forms/ContactForm.form.yaml
@@ -121,6 +121,11 @@ renderables:
         type: Textarea
         identifier: message
         label: 'Deine Kontaktanfrage'
+      -
+        defaultValue: ''
+        type: Text
+        identifier: bookingNumber
+        label: 'Buchungsnummer (falls vorhanden)'
       -
         type: LinkedCheckbox
         identifier: privacypolicyaccepted