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:       Have you finished your work ?  
 Person2:Not because I ’ m keeping an eye on the baby .  
 Person1:        Where is the baby ’ s mother ?  
 Person2:She is at the supermarket downstairs . She said she would be back in about half an hour . 

formal