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:       Oh , my god ! My wallet is lost . What should I do ? It drives me bonkers .  
 Person2:Dear , don ’ t worry . The police can help you . 

informal