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: Mary , I heard you moved again .
Person2:Yeah . I could not stand living here . There is always much noise in the neighborhood .
Person1: You mean noise ? How could it be ?
Person2:You know , on weekends when we wanted to have late rise in the morning , our neighbour started to raise Cain .
Output:
formal