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 think Tom will be elected president ? 
 Person2:No , I think Harry will get it . 
 Person1:        Let's make a bet on who gets it . 
 Person2:OK , loser buys pizza tomorrow night . 

formal