Dear [Name], It’s getting colder.

Most people have several year-end parties at this time every year in Japan as Korea.

>> Most people have several year-end parties in Japan just like in Korea.

 I also have two parties.

>>Correct.

One is a laboratory's party and the other is Korean Class's one which is relative to Korean Student Associate.

>> One is a laboratory's party and the other one is Korean Class' which is relative to Korean Student Associate.

I had to plan the latter.

>> I had to plan the later.

It is bothering me too much.

>> Correct.

I sent e-mail several times in order to arrange their schedule.

>> I sent e-mails several times already,in order to arrange their schedule.

After reservation of restaurant, I finally sent a confirming e-mail yesterday.

>> After having a reservation of the restaurant, I finally sent a confirmation e-mail yesterday.

But I received an e-mail from a chief of this group.

>> But I received an e-mail from the leader of this group.

that was she will contact me after she check. I was little bit upset.

>>That she will contact me after she check. I was little bit upset.

I thought it looks just quarrel because I already arranged and finished it.

>> I thought it  looks to be a quarrel because I already arranged and finished it.

If she had any opinion, she should let me know her mind before I arranged it.

>> If she had any opinion, she should let me know,before I arranged it.

 Anyway I talked to her and realized that she just wants to talk together whenever students do anything.

>> Anyway I talked to her and realized that she just want to talk with other students if they don뭪 have anything to do.