Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       It's amazing to me how international business has become . Take my store for example . On any given day , you will find imported items from more than 20 different countries on our shelves . 
 Person2:How many different varieties of products do you import from China ? 
 Person1:        China provides the bulk of our product inventory , for sure . We import more than 40 different items from China . Most of the imports that come out of China are low-grade plastics or toys . Japan produces many electronic exports , Germany produces excellent mechanical exports . 
 Person2:Do you import any food items ? 
 Person1:        Generally speaking , food items are difficult to import . Food with the short shelf life is liable to spoil in the time it takes to ship from one place to another . The only food items we import are specialty canned or preserved foods . The shelf life is longer for these products . 

formal