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:       Give me your hand . ( takes Rose's hand ) Close your eyes . Go on . ( Rose closes her eyes ) Step up . Now hold on to the rail . Keep your eyes closed ; don't peek .  
 Person2:I'm not .  
 Person1:        Step up onto the rail . Hold on . Keep your eyes closed . Trust me ?  
 Person2:I trust you .  
 Person1:        All right , open your eyes . ( Rose opens her eyes . She stretches her arms , and Jack stands behind her , arms around her . )  
 Person2:I'm fling , Jack . ( singing ) Come , Josephine , in my flying machine . Up she goes , and up she goes ... 

formal