Hi venice
I am a river and I am so happy to meet you and I was able to hear your English and I felt you are so fluent teacher
through first class with you
I need English Seriously and I have been trying to improve my english
Because, First Studying english make me fun and it can release my stress Second, Finding a job always need a someone who can speak english well in korea
Speaking english is very big strength in korea and Someone who want to raise their salary can surely speak them
I am an old people and I have to make more money
The most important thing I need is a studying English Please help me and teach me carefully
I am going to go business trip to japan tomorrow so I am afraid to postponed next class
I really want to see you next Monday
Bye

Corrections:

I am River and I am so happy to meet you. (and I was able to hear your) When I heard you speaking in English, (and) I felt you are so fluent. (teacher through first class with you) I need to learn English seriously and I have been trying to improve (my english) it. It is because(, First) studying English (make me) is fun and it can release my stress. Second, (Finding a job always) you need (a) to be someone who (can) speaks English well if you're looking for a good job in Korea. Speaking English is very important (big strength in korea) and someone who wants to raise their salary (can surely speak them) should be fluent in using it. I am (an) already old (people) and I have to make more money. (The most important thing I need is a studying English) Please help me and teach me carefully. I am going to go on a business trip to Japan tomorrow so I am (afraid)  going to postpone my next class. I really want to see you on next Monday.
Bye

Hello River. Thank you so much for writing here :) I am very much willing to help you improve your English proficiency. Thank you for trusting me ^^ I'll see you then. Take care! ~

Teacher Venice ~