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:       There's a double feature at the cinema this Saturday . Do you want to go with me ?  
 Person2:What are the movies that are playing ?  
 Person1:        There's an action movie with Harrison Ford and a chick flick with Susan Abandon .  
 Person2:I've never seen a movie I don't like that had Harrison Ford in it .  
 Person1:        So , is that a yes ?  
 Person2:Yes . What time does it start and do you want to meet me there ?  
 Person1:        It starts at one and yea , let's meet there . It's the cinema on the corner of Lincoln and Main .  
 Person2:Great ! I have a coupon for free popcorn at that theater ! 

informal