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:       How are you , Kim ? I haven ’ t seen you around for a few days .  
 Person2:Oh , I was out sick most of last week . I ’ m still not completely over it . You ’ d better not get too close !  
 Person1:        I ’ m sorry to hear about that . Why don ’ t you join me for a hot cup of tea ? It ’ ll be good for you !  
 Person2:Sure , why not ? I could use a rest . 

informal