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'.

Person1: What happened to my cup ?
Person2:I accidentally knocked it off the table and it broke . I'm really sorry .
Person1: Don't worry about it . I've got another one I can use .
formal

Person1: I've come to say good-bye .
Person2:When are you off ?
Person1: I'm flying home on Sunday afternoon .
Person2:Well , good-bye . See you soon .
Person1: Please don't forget to say good-bye to the rest of the family for me .
formal

Person1: Oh , you are out of breath ! What ' s happened ?
Person2:A gang of bastards are wildly shooting on the next street . We must leave this place the soonest .
Person1: That it easy.They get caught before they come here .
Person2:Stop your nonsense ! Quick . Let ' s leave the place !
formal