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:       Thanks for helping me up .  
 Person2:Are you OK ? I didn't mean to put you in danger .  
 Person1:        I'm the hazardous one here . I made three people fall over !  
 Person2:That takes talent ...  
 Person1:        I'm so humiliated ! What's that man saying ? Everyone's laughing !  
 Person2:He said you obviously prefer Greek comedies to Greek tragedies . 

formal