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:       Hi , Jane . How are you doing this morning ? 
 Person2:I'm all right , thanks . Just a little tired . 
 Person1:        Late night ? 
 Person2:Yeah , I got home around two . 

formal