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: Alice , your father is amazing . He ' s 90 years old and he lives alone in that big house .
Person2:I know . He doesn ' t like to ask anyone for help . My dad insists on paying his own bills and taking care of himself !
Person1: That sounds like my Grandmother . She was always stubbornly independent .
Person2:It seems that folks like my father and your grandmother are determined to be on their own .
Person1: They see their independence as a kind of character strength .
Person2:Sometimes they are too independent .
Output:
informal