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:       No . 164 in lane 3 achieved 11 ' 16 in the 100 meter dash . Isn't that something ?  
 Person2:Yeah . He's the most experienced athlete in the field .  
 Person1:        He won the first place !  
 Person2:Good boy ! 

formal