Um (cuneiform)
The cuneiform alphabetic um sign, also dup, tup, ṭup, and DUB, the Sumerogram, for Akkadian language "ṭuppu",, is found in both the 14th century BC Amarna letters and the Epic of Gilgamesh. In the Amarna letters as um, it is found as um-ma in the introduction of the letters as "Message "....
In specific texts with dialogue, for example Amarna letter EA 19, Love and Gold, an extensive discussion is made by the king of Babylon about his father, ancestry, friendship between kings, envoys, women, etc., and consequently the dialogue is preceded by um-ma, then the dialogue by the messenger,.