Verb conjugation of "reproach" in English

The connecting flight to Phuket was fully booked, and the connection to Krabi had five empty seats. The problem was that the boarding began in ten minutes and I did not even have a ticket.
My correction were added and highlighted with yellow markers and attached to this email. Tell me now if you have any questions about grammar rules, since I was a teacher 10 years ago.
I guess the whole idea is about improvement, correct? How are you these days anyway. Since I want to practice a bit, I decided to join here. I'll be happy to start with you. Let us try it.