[KYS]

But is, talk to u soon, at the end of an email a kind of promise, or is it more common to use it by the native speaker, like see u, what means, maybe we will meet us or not. ???????
Or is it depending of the country.. as its common by the americans to say, cause they want to seem friendly, visit us or something, but if u visit them really its not evertime expected..

i am looking forward of answers, thanks