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:       How much did you bid ?  
 Person2:Eighty-five dollars . If my bid is the highest after three more days , I win ! It's fun !  
 Person1:        We'll see how much fun it is after they take all your money ! !  
 Person2:But they won't ! I checked the seller's history , and he got good reviews from other buyers .  
 Person1:        What if he had his friends fake the reviews ?  
 Person2:You are so paranoid ! Not everybody is a crook , you know . 

informal