People you don't expect in dreams

There is nothing more confusing or disconcerting than dreams in which unexpected people show up for reasons not clear to you when you wake up.

For example: Last night, I had a dream where someone whom I did not expect appeared in my dream. For some reason I was supposed to meet this person. We had a conversation, as I was apparently trying to convince them to come with me somewhere, which they acquiesced to. We drove in separate cars. When we arrived, the person got out of the car, and was apparently on the phone with some country leader - a prime minister, I believe - and was talking with them on the phone as I was walking with them, trying to have a conversation. The individual hangs up, we start to go around the side of the house, and a family member calls me about meeting for lunch. I speak with this person, who again seems somewhat reluctant to go to that restaurant.

And then I woke up.

The two things that nag me are: 1) What was the person doing there? It was not someone I would have expected; and 2) What was it about them that so made me desire to get their attention?