Genesis 16:8

And He said, Hagar, handmaid of Sara, whence comest thou, and whither does thou go? And she said, From before Sara my mistress I have escaped.

?אי מזה באת ואנה תלכי, the angel wanted Hagar to realise what kind of an unprofitable exchange she was about to make if she left the house of a man such as Avram and traded that holy environment in the land of Canaan, preferring the spiritually contaminated regions outside the Holy Land and the evil people residing there.

אנכי בורחת, "I am not going to a place I have chosen myself; I am simply escaping intolerable conditions."

ויאמר, the vowel patach (instead of segol) under the letter מ is used as if there were a colon after the word. This is not unusual, seeing that words with the tone-sign revia occasionally signal that the word is meant to end with a colon or similar, meant to be followed by an explanation. Seeing that here the subject matter itself introduces an interruption, seeing that what follows is not connected to the word ויאמר, we need to understand the word as referring to what preceded it. This is so whenever the word ויאמר appears with the vowel patach.

הגר, the angel called her both by her name and by her station in life, i.e. the slave of Sarai. Seeing that she was supposed to be attending to Sarai's needs, he wanted to know what she was doing in this location. He continued with "where do you come from and where do you think you are headed?"

בורחת, Hagar confirmed that she had no idea, seeing that she was merely fleeing in order to escape the torment Sarai had subjected her to. The vowel patach in the word בורחת, at the end of a verse is most unusual. [the vowel kametz would have been expected. Ed.]