Rav Simloi in the Gem Brochos 32a says
לעולם יסדר אדם שבחו של הקב"ה ואחר כך יתפלל A person should always praise Hashem first and then pray.
We learn it from Moshe Rabeinu. Why did not Eliezer know this principle?
Eliezer Braishis 24 (11, 12) went to find a wife for Yitzchak and prayed to Hashem without any praise beforehand.
11 And he made the camels kneel outside the city beside the well of water, at eventide, at the time the maidens go out to draw water.
12 And he said, "O Lord, the God of my master Abraham, please cause to happen to me today, and perform loving kindness with my master, Abraham.