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:       Is your father in the habit of having naps ? 
 Person2:Yes , all of us have naps . 
 Person1:        Don't you feel dizzy when you have to get up ? 
 Person2:No , not at all . 

formal