—Hi, how's it going? 喂，都还好吗？
—Do you have any idea what time it is? 你知道现在几点了？
—Yes, don't freak out. I'll be there in no time. 知道，放心吧，我快到了。

How's it going?=How are you?/Hello.

Do you have any idea how hard/important this is?
你知道这个有多么困难/重要吗？

Don't freak out.=Don't worry. 放心
to freak out=to worry/to be scared

I have test tomorrow, I'm freaking out. 明天要考试了，我很担心。

That movie freaked/scary me out. 那部电影很吓人。