What is the meaning of мой хороший in day-to-day conversations?

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Answer

Tis is affectionate name. The equivalent in English: sweet, honey.

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It was in a conversation between a guy and a girl-
Шаша: Доброе утро
Лена: Доброе утро, мой хороший

I couldn't find a reasonable translation in either Google or Yandex. That's why I'm asking you guys.

Answer

мой хороший what? What context of this phrase?