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:       Mom , you know that Andrea and I sometimes worry about you .  
 Person2:Really ? Why would you worry about me ? I ’ m just fine .  
 Person1:        You ’ re almost 70 years old , Mom ! Don ’ t you think it would be better for you if you moved in with us ?  
 Person2:No way ! I like my apartment , and I like to be independent .  
 Person1:        Do you ever get lonely living alone ?  
 Person2:Not at all . I see you and your family twice a week , and I enjoy seeing my own friends . I ’ m too busy to feel lonely ! 

informal