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:       Your 3.5 percent share is going to be worth at least a million .  
 Person2:I need to be motivated , Vince.Multi - motivated . As in multi-million .  
 Person1:        What if I said no ?  
 Person2:Ever hear of WebTracker ?  
 Person1:        You wouldn't ! If you leave , you'll make nothing .  
 Person2:I might make nothing even if I stay . For that kind of risk , I want to get rich .  
 Person1:        OK . If you sign the Stars.com account before WebTracker does , we'll talk next week . 

formal