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:       Today people are hearing about information superhighways and the intermet .  
 Person2:Is this change going to be beneficial for theindividuals like you and me .  
 Person1:        Yes , I think so . My friend once used it mostly to play chess , but now he has learnt how to do other things on the Internet .  
 Person2:There's no doubt the Internet will be a powerful commercial medium . It'll connect hundreds of millions of customers and open up huge markets for all kinds of products and services .  
 Person1:        That's true . I can imagine companies sending advertisements directly to customers over the net . Customers , in turn , can examine and compare whatever goods they want to buy and tell their computers to find them at the best price offered .  
 Person2:Yeah . It'll be a shoppers heaven . That's the use of net in E-commerce . 

formal