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:       Jim and you are bosom friends , aren't you ?  
 Person2:I wouldn't say so .  
 Person1:        What do you mean ?  
 Person2:Well , I thought he was , but he ends up to be a con man . 

formal