[NTG-context] Proper formatting of itemized bullets in ConTeXt

Dear All, Is there a straightforward way of setting up the itemize command such that every first letter is capitalized, regardless of whether I do so in the source file? Also, is there a way to insert a comma at the end of each item except for the last, and then a full stop at the end of the last item like follows? - First item, - Second item, - Third item, - Last item. Thanks in advance. Amine