Trying not to sound too ignorant while instructing a piece of software in order to allow people to make request of services/items and while trying to say "For how many people would you like to make this request" or "How many of this do you want?", the sound of the sentence in the title appeared kind enough to me.
I followed the empiric principle of postponing the 'for' at the end of the sentence while coping the affermative version of it
I'd like to request it for 3 people -> How many would you like to request it for?
Does that look correct?