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:       Good afternoon , would you mind if I sat here ?  
 Person2:Of course not .  
 Person1:        I ’ m Jack . What ’ s your name ?  
 Person2:Laura .  
 Person1:        Do you like this place ?  
 Person2:I don ’ t think it ’ s very nice . And my father doesn ’ t like it . But my mother likes it very much . So we often come here .  
 Person1:        How often ?  
 Person2:Well , we come here almost every month .  
 Person1:        Who ’ s that ?  
 Person2:It ’ s my mother . She ’ s fond of swimming . And the man beside her is my father .  
 Person1:        Do you like swimming ?  
 Person2:No , I hate swimming . I prefer playing tennis . 

formal