Answer:
Formal Dictation.
Step-by-step explanation:
Formal Dictation is the language we use in more formal situations and is marked by the use of the cultured norm, the lack of slang, and the use of more formal words, such as the phrase: "To my horror, I realized that I had absentmindedly mailed the urgent letter without a stamp. "
Formal dictation is used in professional, academic or when there is no familiarity between the interlocutors, where more seriousness is required.