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:       Hey , Karen . Look like you got some sun this weekend .  
 Person2:Yeah ? I guess so . I spent the weekend at beach .  
 Person1:        That ’ s great . Where did you stay ?  
 Person2:Some friends of my parents live out there , and they invited me there .  
 Person1:        So , what did you do out there ? I mean besides bask in the sun , obviously .  
 Person2:I jogged up and down the beach and played volleyball . You know I never realized how hard it is to run on sand . I couldn ’ t get through a whole game before I had to sit down .  
 Person1:        Not to mention cooler . Did you go swimming ?  
 Person2:I wanted to , but the water is too cold , and I just wetted in up to my knees .  
 Person1:        It all sounds so relaxing . I wish I could get away to the beach like that .  
 Person2:It looks like you could use it . Don ’ t tell me you spent the weekend in the library again . 

informal