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:       Both Bob and carl will become somebody in the future.Don ' t you think so ?  
 Person2:Yeah.But Bob's talent can't to be named on the same day with Carl's .  
 Person1:        But Bob is more generous and ready to help .  
 Person2:We cannot judge a man totally by that . 

informal