Please. The dialog is painful. It's what a stupid adult thinks that a smart child talks like. I've set the following, and it seems all other NPCs are obeying these commands but it hasn't stopped Sam and Cora's verbal diarrhoea:
setgs fAIMinGreetingDistance 1.00
setgs fAIHelloTimer 1200.00
setgs fAIGreetingTimer 1200.00
setgs fAIExclusiveGreetingTimer 1200.00
setgs fPlayerGreetingSameActorTimer 1200.00
setgs fCommentOnPlayerActionsTimer 1200.00
setgs fTimeBetweenIdleChatter 1800.00
setgs fAICommentWaitingForPlayerInput 300.00
Will someone please shut these two fecking idiots up!!