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 things still going badly with your house guest ? 
 Person2:It ’ s getting worse . Now he ’ s eating me out of house and home . I ’ Ve tried talking to him but it all goes in one ear and out the other . He makes himself at home , which is fine . But what really gets me is that yesterday he walked into the living room in the raw and I had company over ! That was the last straw . 
 Person1:        leo , I really think you ’ re beating around the bush with this guy . I know he used to be your best friend in college , but I really think it ’ s time to lay down the law . 
 Person2:You ’ re right . Everything is probably going to come to a head tonight . I ’ ll keep you informed . 

informal