You are still using i :)

* Hi Dave! Thanks for the help. If I need you I know where I can find you.

Knight, I believe her response was meant sarcastically.  I'm done here.

Hey there!! I'm a really good TEACHER teacher <-- no need to "ALL CAPS" the word teacher. If you want something to stand out in all caps the better choice would have been the word "GOOD" and I<---always capitalize the single letter "I" need to improve my English!

What do you teach Nika?

I teach Russian and when I said that I'm a good teacher, I mean that I like to teach, do it passionately and thoroughly.

The first step would be to follow the advice given & stop using "i" when it should always be "I".