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:       He's only interested in harassing you . How can he expect us to have so much time to waste ?  
 Person2:I almost want to send him a virus to shut his stupid computer down .  
 Person1:        As obnoxious as Bean is , we should still try to finish this case .  
 Person2:True-well , do you have any forwards for me to send him ?  
 Person1:        Yeah ! Remember that one about putting light bulbs in your mouth ? 

formal