just trigger a condition to true or change a variable to 1,2,3,... if you spoke to them the first time. before dialog starts check the condition/variable and then depending of its state starta different dialog
You mean
value not
variable, but yeah... that's the way to go about it. If queries combined with conditions or values. If you are feeling adventurous then you could also have it return a random display text by using the set random value action part as the first action part in your action block, then you would add the if value = x queries as per usual.