帮我看看这几句话有什么错误？

Hi Sachie,
This is Amber. [I remember you absolutely] 或者 [Of course I remember you]
How's [it] going?
We['ve had a] 7 days holiday for the spring festival [如果你要用spent, 应该要告诉他你去了哪，比如We've spent the 7-day holiday for the Spring Festival in Beijing]
Today's the first day that we go [back] to work
后面对。

This is Amber. Surely, I remember you.
How's going?
We had spent 7 days celebrating the Spring Festival. Today is the first day we go to work.
Is there any chance that you may come back to china again?
Wish you luck and happy.

Hi,Sachie,
How are you going?
This is Amber. I miss you very much.

In China,we had 7 days holiday for the Spring Festival. Today is the first day that we go to work.
Is there any chance that you can come to china again?
Wish you were luck and happy.

Best Regards,

Amber

对的诶