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: I've been accepted by the university , and they've offered me a position on the basketball team !
Person2:That's wonderful ! Icing on the cake .
informal