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:       I went to the doctor yesterday .  
 Person2:I beg your pardon ?  
 Person1:        I said I had been to the doctor the day before .  
 Person2:What did he say ?  
 Person1:        He said I ' d got the flu .  
 Person2:Oh dear ! What did he tell you to do ?  
 Person1:        He told me to stay in bed for ten days .  
 Person2:Ten days ? Would you please repeat it again ?  
 Person1:        Yes , ten days . 

informal