Genesis 24:15, 45 - Before the prayer was finished.

And it came to pass, before he had done speaking, that, behold, Rebekah came out, who was born to Bethuel, son of Milcah, the wife of Nahor, Abraham's brother, with her pitcher upon her shoulder.

And before I had done speaking in mine heart, behold, Rebekah came forth with her pitcher on her shoulder; and she went down unto the well, and drew water: and I said unto her, Let me drink, I pray thee.

Notice how fast Eliezer's prayer was answered. God will answer your prayers just as fast (Isaiah 65:24) if you depart from evil, do good, and continually seek for peace (Psalm 34:14).