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:       Are you sure it was him ?  
 Person2:I used to date him . Of course it was him .  
 Person1:        You're a nurse at New York General Hospital ?  
 Person2:Yes , on the cancer ward . And Taylor was there . He walked right by me and didn't even see me .  
 Person1:        Maybe he was just visiting someone .  
 Person2:But you saw how skinny and pale he looks . He has " cancer patient " written all over his face . 

formal