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:       Hi , Elvin . How are the new programmers I got for you ?  
 Person2:Stay away from me .  
 Person1:        Are you still mad about your nose ? How is it ?  
 Person2:I'm serious , Zina . Back off . I have a bottle of pepper spray in my pocket .  
 Person1:        That won't be necessary , Elvin . Look , I want to apologize for your nose . I'm sorry .  
 Person2:Why are you being so nice to me ? Don't think for a second that I trust you . 

informal