Formality and detail depend on audience and purpose. Preserve the meaning when moving from a friendly to a professional style. Formality does not require unnecessarily difficult words.
Practical examples
Can you send it today?
هل يمكنك إرساله اليوم؟
Could you send the revised version by the end of today?
هل يمكنك إرسال النسخة المعدلة قبل نهاية اليوم؟
We would appreciate confirmation of the proposed date.
نقدّر تأكيد الموعد المقترح.