If you appreciate my assignments, and realize the values are worthy, then you can let me buy a cup of coffee, so that I can remain constant refreshed here with more work, and serve you the best ever in the future projects.
Thousands of greetings. It's very pleasure for me, to work - to listen from you. A small attempt can make someone pleasure.
In a word, if you mind with the matter, no need. Cause of, for a great relation to maintain, avoid misunderstanding.