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:       What are in this folder ?  
 Person2:They are reports of our company .  
 Person1:        Are they filed alphabetically ?  
 Person2:No , they are filed according to dates .  
 Person1:        Can you find last month ’ s report for me , please ?  
 Person2:No problem , here you are . 

formal