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 seems to be the problem ?  
 Person2:My stomach hurts , Doctor .  
 Person1:        Has this been a problem before ?  
 Person2:Yes .  
 Person1:        For how long ?  
 Person2:I have had it on and off for the past three years . It's just gotten much worse these past two weeks .  
 Person1:        Do you only feel this way when you stomach is empty ?  
 Person2:After I've eaten , it goes away for a while .  
 Person1:        Do you feel nauseous ?  
 Person2:Yes , occasionally .  
 Person1:        Do you have regular bowel movements ?  
 Person2:I think so .  
 Person1:        Let me take a look at your abdomen . Lie down on your back and bend your knees up . OK . relax ... Alright , it seems like you have a duodenal ulcer , but we'll have to run some tests before I can be certain . You should get a good rest first and try not to strain your stomach too much .  
 Person2:Is it serious ?  
 Person1:        Not too serious , but it'll take you some time to recover , so you'll need to be patient . 

formal