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 can see you've got some color back in your cheeks . 
 Person2:Yes , I find jogging does good to me , so I keep on doing it . 
 Person1:        You've formed a sound habit . 
 Person2:I think so , too . 

informal