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:       What's wrong with you ? 
 Person2:I have a sore throat and headache . 
 Person1:        Do you feel tired ? 
 Person2:Yes , my whole body feels weak . And I really feel terrible . 
 Person1:        I'm sorry to hear that . I'll have to examine you . 
 Person2:Ok , go ahead . 
 Person1:        Open your mouth and show me your tongue . Say ah ... You have a bad cold . So you must stay in bed for a week . 

formal