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:       So Kevin , what is your type ?  
 Person2:I like girls who like to have fun , and aren't too serious .  
 Person1:        I agree . I like guys that can make me laugh .  
 Person2:That's true . Having a very serious boyfriend or girlfriend can be boring . 

informal