[GUESTNAME] - name of the guest / Nachname des Gasts
[GUESTSNAME] - name of all guests listed on the "guests" tab of the booking / Namen aller Gäste aus dem Reiter "Gäste" der Buchung
[GUESTNAMES] - name of all guests in the booking / Nachnamen aller Gäste in der Buchung
[GUESTSNAMES] - name of all guests listed on the "guests" tab of the booking / Namen aller Gäste aus dem Reiter "Gäste" aller Buchungen in einer Gruppenbuchung
[GUESTFIRSTNAME] - firstname ofthe guest / Vorname des Gasts, erster Buchstabe Großbuchstabe