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:       He has lots of hobbies . 
 Person2:And he ’ s always busy with his pictures and roses . 
 Person1:        He ’ s won a dozen prizes for his pictures and roses . 
 Person2:But as for his business in the city ... 
 Person1:        He lets his cousins look after his business . 
 Person2:He sounds more like an artist than a businessman . 

informal