The dreams that someone has are so much down to the experiences and character of that individual that interpreting them by someone who hardly knows them is pointless.
Freud and Jung were way of the mark with dream interpretation in my view - suppressed desires etc..
Dream interpretation is a bit like astrology, if you create a set of rules, people start living by them to fulfill the prophecy, or at least looking for the rules in their lives.
In a very general sense dreams can be interpreted as the subconscious going over past experiences, or practising possible future experiences, but unless you know the subject and their waking and dreaming lives, more accuracy is futile.