I am taking a great liberty of writing you these few lines and trust you will not misunderstand my intentions.
The fact is that I have now been in your work for 10 months, and I believe that my work has been of real value to you.
When I joined your firm, I was told that my salary should increase to a maximum of 8,000 baht. The salary is lower than the standard of accounting and Higher cost of living in the present.
I should therefore be much obliged if you would be so kind enough as to give me a rise in my salary as soon as possible.