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:       Do you speak only English in the class , or does your teacher explain everything to you in Spanish ?  
 Person2:Oh , we never speak Spanish in class ! Miss.Parker speaks to us only in English .  
 Person1:        I suppose she's right . Does she speak English very slowly ?  
 Person2:Not always . Sometimes we don't understand her . Then she has to repeat what she said .  
 Person1:        It must be interesting to study English .  
 Person2:Mario and I are the best students in the class . Miss Parker says that my pronunciation is very good .  
 Person1:        Is English pronunciation easy or difficult ?  
 Person2:Sometimes it's difficult . Some words look different from the way one pronounces them . 

formal