Dear Khun Darren
I am taking a great liberty of writing without asking your permissions and trust you will not misunderstand my intentions.
The fact is that I have now been in your service for one year, and I believe that my work has been of real value to you.
When I joined your firm, I will got my salary and site allowance should be more than 60,000 baht. Now I am getting only my basic salary and a little bit allowance.
I should therefore be much obliged if you would be consider the annual salary increase to be fair to me.
Best regards,
Chayanon Nomwongju