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 sit 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