Dear client,
What interests me the most is that your project is very similar to what I have been doing for the past couple of years.
Most of my clients ask for one type of proofreading at a time, but I'm sure I can do a mixture of highlighting, commenting and change-tracking for you.
Plus, you would find me approachable and very communicative throughout the whole process.
I'm available to answer any questions you have.
Warm Regards,
Bisan