It is quite an art to be clear and concise. It sounds easy, but it isn’t at all. There is a saying in English: “one thought one sentence”, or as the American Writer Society claims “One thought per sentence – one idea per paragraph”.

Perhaps it will help you to think from the end. “What shall be the result, the outcome, of this memo?”. Taking it from there may structure your thoughts the right way. 

And it will also help you most probably to find a good subject line, one which describes your request best. 

Please consider:

• the subject line often decides if and when people read your message,
• the subject line creates expectations, be it positive or negative,
• if your text doesn’t match the expectations, you might confuse (confound) and annoy your recipient.