What Thomsen wrote was:
"You should not say thank you twice. bitten = thank you (tak) and Danke is also thank you (tak). I also think bitten should be written without n so it is bitte"
Could it be "Darf/Kann ich bitte ein Wienerschnitzel mit Kroketten und ein Sprite haben"? (I prefer "Kann" because "Darf" sounds as if you asked for the permission)