For this scenario I recommend giving the players the faction missions, as many of them give the players an idea where to start talking (gives them a motive that helps them get into character).
For example the Grand Lodge mission is to talk to Nigal, and if I recall it says Nigal tries to avoid pathfinders, so I had him back away when he realizes pathfinders were coming to talk to him. It got the two players more involved as they worked together to corner Nigal on the ship to have a 'friendly' conversation...
Andoran, Grand Lodge, Taldor, and Silver Crusade all had missions for talking with the guest. A few others may have too but I remember those 4 did.
EDIT: Actually now that I think about it I remember Cheliax had a guest talking mission too, but it was a bit different then normal.