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:       Do you feel all right ? You look Pale .  
 Person2:All my joints seem to hurt and I have a terrible headache .  
 Person1:        Have you taken your temperature ?  
 Person2:No , not yet , but I do feel a little feverish .  
 Person1:        How long have you been feeling this way ?  
 Person2:Only since this morning .  
 Person1:        Oh , probably you've been working too hard .  
 Person2:Maybe you are right . 

formal