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 anybody in ?  
 Person2:How can I help you ?  
 Person1:        I have a headache .  
 Person2:Let me take your temperature with a thermometer .  
 Person1:        OK .  
 Person2:I think you have a small fever .  
 Person1:        I thought so . I felt dizzy this morning .  
 Person2:You should've called in sick ! Next time , have either of your parents call the school office . 

informal