Hi Harald,
did you change the booking field names? NAME is for example needs for example the firstname and lastname bookingfield to be untouched, else this placeholder will not work.
The rest of the booking fields you mention are also dynamic placeholders, e.g. for MAT_BOOKING_ZIP to work there needs to be a published bookingfield named zip (The fieldname is the intern name of the booking field and not shown to anyone - so there is no reason to translate it!).
Syntax is always MAT_BOOKING_FIELDNAME.
Kind regards,
Yves
P.S.: You can find more informations on that topic in the documentation and in our Youtube-Channel.
P.P.S.: Weiter unten gibt es auch ein deutschsprachiges Forum für Matukio