I try to buy non GMO foods.  I am nervous about eating GMO foods.
What does GMO stand for? And why would you be nervous about them?
I think it stands for genetically modified organism.  I am unsure if it is safe to eat foods that have had their genes messed with by people.
Oh that sounds awful! Is there any proof that it's unsafe? What makes it unsafe?
I was hoping that since you were knowledgeable about the subject, you could tell me more about GMO foods. 
Well, I have heard that genetically modified foods have undergone a lot of controversy, including whether there should be labels stating the dangers of genetically modified foods.
Do you know about any dangers of consuming them?  Do they cause cancer or sickness?
I'm not sure if they can cause cancer, but there can be an effect on health and the environment.