Hej, chciałem Was prosić o sprawdzenie czy poniższy tekst jest napisany poprawnie i czy ewentualnie można coś jeszcze poprawić?
This is my last day, so I would like to thank you for the good working relationship. It was a great experience working with you and I am happy I was able to help. I am glad that I could meet you and I will remember this time as very successful. I wish you success in your personal life and many career opportunities.