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 don ’ t dare to look after the children now . 
 Person2:Why ? 
 Person1:        The children always make themselves in danger . I always have my heart in my mouth with them . 
 Person2:It is because your children have grown up , and you haven ’ t lived with a child for a long time . 

formal