Do you like ice cream? I eat it all the time, but I am very basic, just vanilla and chocolate
Yes I like ice cream.  Ice cream is made from dairy products. 
Yeah that makes it tough for certain people to eat, I feel so bad for them
Yes, most people in the world is lactose intolerant. Ice cream is also sweetened with sugar or sugar alternatives. 
Most people are really lactose intolerant? That is terrible!
Yes, when you account for the entire world. Lactose intolerance severity depends on the amount eaten or drunk. 
Huh, that is new to me, that is not good. My mom has it as well
Some people even have milk allergy.  They have a negative reaction to the protein in the cow milk.