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:       Do you enjoy going on dates ? 
 Person2:Yes . I find dates to be a lot of fun . 
 Person1:        What's so fun about them ? 
 Person2:They give me the opportunity to get to know someone better . 
 Person1:        So you always have fun on dates ? 
 Person2:Not always . I don't always like the person I'm on the date with . 
 Person1:        Why not ? 
 Person2:My date may not be my type . 
 Person1:        So then why would you ask them out in the first place ? 
 Person2:I didn't realize until after our date that they weren't my type . 
 Person1:        Sounds like a huge waste of time to me . 
 Person2:Now that I think about it , it really is sometimes . 

informal