How do you dedicate your gender? =)

I can't understand another one thing in english.
Let's imagine typical situation. You are sitting at your reach apartments on 100-stage penthouse. And suddenly in anonymos-chat, where are you spending time with a little cup of "Kopi Luwak", someone knock on your internet-window and asking: "Hi, how are you?". And you answering at same time: "Fine, very good". And someone typing repost: "I am too feel good".
So, what a question - how to dedicate gender of your opponent?
For example, in Russia we can easy dedicate it about words, for example "went" if it is say man: "Poshel", girl: "Poshla".
But how you, english-speaking people do it? This is the question.