The correct phrase is "dream come true." However, the phrase "dream comes true" can be used in a sentence like this:
When you experience a dream that comes true, it means that an event or situation in your life has unfolded in a way that closely resembles or matches something you previously dreamt or imagined.
When someone refers to a "dream come true," they are describing a situation or experience in which something they have long desired or wished for has finally been realized or achieved.
In a quaint little village nestled between rolling hills and whispering forests, there lived a young girl named Lila. Lila was known for her vibrant spirit and insatiable curiosity. Every evening, as the sun dipped below the horizon, she would sit by her window, gazing up at the stars, wondering about the mysteries of the universe.