Does giving someone a second chance always turn out successfully?

No.

Explanation:

This can turn out well, but in most cases, when one gives someone a second chance, they never stop giving them out.

For example, Stacey wanted to go to prom with Tom and he agreed. However, he stood her up the whole night and went out with friends instead. She was hurt and tried to cut him off but he begged to let him stay and promised he'd be better, so Stacey gave him a second chance.

They end up dating but Stacey finds herself getting stood up for dates and such all the time for him to hang out with friends, but she keeps giving second chances.

The second scenario goes as follows: Stacey wanted to go to prom with Tom and he agreed. However, he stood her up the whole night and went out with friends instead. She was hurt and tried to cut him off but he begged to let him stay and promised he'd be better, so Stacey gave him a second chance.

The second time he was better. They dated and he was loyal, and things ended well.

It depends on how manipulative the person is.

some sort of sound device i believe.

this would be in the imperative mood. it is a category of verb forms that are used to express orders,instructions,commands or requests.