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:       Who's that striking woman over there ?  
 Person2:Hm ? Oh , that's Alice . She's totally mad . Don't get yourself in a room alone with her .  
 Person1:        Really ? Why not ? She looks great .  
 Person2:Yes , I know , but she's dangerous .  
 Person1:        Really ? Tell me more .  
 Person2:Well , I'm not one to gossip , as you know , but rumor has it that she sued her former boss for sexual harassment .  
 Person1:        Wow , crikey . So what happened ?  
 Person2:Well , this is just between ourselves , of course , but he was her lover and he wanted to leave her , so she got revenge . I heard him say she was a dangerous woman .  
 Person1:        Wow .  
 Person2:Oh , while we're on the subject , what happened to you and your secretary ?  
 Person1:        I have no idea what you're talking about .  
 Person2:Oh , come on . Everybody knows .  
 Person1:        Could you excuse me a moment ? I have to make a phone call  
 Person2:Oh , sure . 

informal