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:       Excuse me . My bag was stolen , will you help me ?  
 Person2:When did it happen ?  
 Person1:        Just about half an hour ago .  
 Person2:Tell me where it happened and how .  
 Person1:        Yes , it was just when I was walking in the park . I saw some children with a newspaper .  
 Person2:That happens often these days . Well , please fill in this Report of Theft .  
 Person1:        I want to get in touch with the Chinese Embassy because my passport was in the stolen bag . 

informal