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:       Look , Jim . That man just fell down over there . 
 Person2:We better see if he ’ s o . k . 
 Person1:        Sir ... sir ? Are you all right ? Sir ? 
 Person2:He ’ s not answering . You ’ d better check his pulse and breathing . 
 Person1:        Oh , no . He ’ s not breathing , and there ’ s no pulse . Call 911 . 
 Person2:Hello ? Yes . Someone has passed out at Connecticut Ave . and 1st St . He isn ’ t breathing and does not have a pulse . Yes . My friend is performing CPR . OK . Thank you . They ’ re sending an ambulance . Here , let me help . 

formal