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:       Well , it's too bad that we like different kinds of movies . Maybe we're just different kinds of people .  
 Person2:Yeah it's too bad ... but actually I think I know what to do .  
 Person1:        What's that ?  
 Person2:We can go to a horror movie , and I'll hold your hand so you don't get scared .  
 Person1:        You mean ... like on a second date ?  
 Person2:Of course ! Or are you still too scared !  
 Person1:        No way ! That sounds great ! 

informal