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:       Help ! Help ! 
 Person2:What's the trouble , ma'am ? 
 Person1:        I was taking a walk when a young man came at me from nowhere and snatched the bag off my hands and ran away . 
 Person2:What did the young man look like ? 
 Person1:        Well , he's young , tall and thin . 
 Person2:To which direction did he run ? 
 Person1:        Let me see ... my right arm ... oh , to the east . 

informal