You can't delete a post, and we rarely remove posts on request. We think it's unfair to others who have taken the time to reply.
If it's a straightforward request and your post has no replies, you can flag it, leave a note, and we'll take a look. If your post has replies but you feel your situation is an exception, flag your post and include an explanation of the situation to our moderators in your comment. We'll do our best to help.