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:       Here you are . How is Danny ?  
 Person2:Better now . We are just back from the hospital . We were lucky to meet a well-known doctor .  
 Person1:        What did the doctor say ?  
 Person2:He said that he had a really bad cold .  
 Person1:        Shall we go back home now ?  
 Person2:The dispensary closed . Here is the given prescription .  
 Person1:        I bought some advanced medicine . Is there anything you need ?  
 Person2:Probably not . Some medicine we need is ethical drug which you can't buy without a prescription .  
 Person1:        Now what ?  
 Person2:I'll go back home with Danny . You go to the pharmacy again .  
 Person1:        Okay , this is the third time .  
 Person2:What ? How come ? The third time ?  
 Person1:        You don't have to know . Bye for now .  
 Person2:Be careful . 

formal