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:       Hello , james . Come in . go through to the living room . 
 Person2:Hi Kate ... thanks ... wow ! Look at all the furniture . You must spent a fortune on it ! I love your new three-pieces suite . 
 Person1:        I told you that I had been saving up money to buy some new furniture and do some redecorating . I finally saved enough and did everything at once . 
 Person2:Good for you ! You ’ Ve got new curtains too . That ’ s a very nice shade of blue . This sofa is very comfortable . I could sit on it all day ! 
 Person1:        Do you like my carpet ? Be honest ! Tell me what you really think . 
 Person2:To be honest , it looks like your old carpet . Is it really new or did you just have your old cleaned ? 
 Person1:        Well spotted ! I actually had it cleaned twice , because it was so dirty . The rug is new . You remember my trip to china ? Well , I bought is there . 

informal