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:       I'm so excited ! We have two weeks off ! What are you going to do ?  
 Person2:I'm not sure . I guess I'll just stay at home . Maybe I'll catch up on my reading . What about you ? Any plans ?  
 Person1:        Well , my parents have rented a condominium in Florida . I'm going to take long walks along the beach every day and do lots of swimming .  
 Person2:Sounds great !  
 Person1:        Say , why don't you come with us ? We have plenty of room .  
 Person2:Do you mean it ? I'd love to ! 

informal