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:       David , what's new with you ? You are not in the mood . Can you tell me ?  
 Person2:After six months , my college life will come to the end . The following trouble will be the job-hunting . That's really a headache .  
 Person1:        Do not take things so seriously , my pal ! Every one of us will face the trouble and job-hunting is inevitable . Take it easy ! Believe in yourself and some day you will be successful .  
 Person2:It sounds reasonable . Maybe I should look on the bright side . 

informal