1.We are very disappointed that you no longer require our services.(normally, but if you only provide one service then service would be fine)
2. Thank you very much for throwing the warm farewell party the other day
3. How are you getting on with the new web server?
4. If you need a helping hand regarding the set-up of the new web server, please contact me anytime.
5. Thank you for your comments. I have decided to take your advice
6.I'd like to thank you for preparing the warm farewell party for me/us the other day.
7.Due to company-wide organizational changes, I regret to have to tell you that I'll be returning to Korea next month.
Student or Learner