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:       Who ’ s that ?  
 Person2:It ’ me . Susan Taylor  
 Person1:        Oh , please come in . nice to see you .  
 Person2:On , what ’ re you doing ? You look as busy as a bee .  
 Person1:        Yeah , I ’ m trying to decorate my house .  
 Person2:Really , that ’ s cool . Let me see what you ’ Ve done .  
 Person1:        But actually it ’ s not done yet . I ’ m going to get a special pendent lamp .  
 Person2:That ’ s all right . Let me see , oh , that lace looks so unique , and it ’ s so creative to make a picture display here . How did you get that idea ?  
 Person1:        It ’ s just a simple decorating . I just want to add my personality to my living space . 

formal