Why shouldn't I eat fast food?
user
Well, I can give you one example of why I think that's a bad idea.  You eat fast food because it's easy and convenient.  It tastes good.  And it's really bad for you, your body, and the environment.
assistant
Okay, any other reasons?
user
One other reason is that it's not very healthy.  It will damage your body, and the food industry uses a lot of chemicals.
assistant
Why shouldn't I eat fast food?
user
Well, I can give you one example of why I think that's a bad idea.  You eat fast food because it's easy and convenient.  It tastes good.  And it's really bad for you, your body, and the environment.
assistant
Okay, any other reasons?
user
Why do you care so much about how fast food is bad for you?
assistant
Why shouldn't I eat fast food?