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:       Sam , what shall I do with my stocks ? Will I lose money ?  
 Person2:There ’ s a possibility .  
 Person1:        What do you mean by that ?  
 Person2:I mean if you don ’ t sell your shares now , it ’ s quite likely that you ’ ll end up losing your shirt .  
 Person1:        Is that so ?  
 Person2:Absolutely . Take my word for it . 

formal