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:       Would you mind if I ask you whether you are married or not ?  
 Person2:To be frank , I was married once , and now I'm single .  
 Person1:        Do you mean you got a divorce ?  
 Person2:Yes , my first marriage was a failure . 

formal