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:       What are you two doing in here ?  
 Person2:We heard you weren't feeling well , so we came to check on you .  
 Person1:        I was sitting there giving out nametags and all of a sudden , there she was .  
 Person2:Who , Femi ? Yeah , Yi-jun saw her inside .  
 Person1:        All these memories of prom night came back to me . I had to be alone . You remember that night ?  
 Person2:I remember someone spiked my punch . You sat with me in the girl's bathroom ... 

formal