F : You look serious. What are you doing?
B : I'm problem solving math but I don't understand how do.
F : Oh, I'll help you, but now we drink coffee?
B : I don't want to go anywhere. It makes me crazy.
F : l don't think you should do that. You should get some rest. Coffee will help you relax.
B : Okay, if you think this is a good way.
F : great. Let's go.