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:       Hello , Lucy , I heard you did a good deal in interview .  
 Person2:It's OK .  
 Person1:        What did you do in the interview ?  
 Person2:I observed the interviewer's manner , mien and gesture carefully besides paying attention to mine .  
 Person1:        Are all these helpful for the interview ?  
 Person2:Of course . The manner of shaking hands can show a man ’ s character . For example , the interviewer who shakes your hand lightly , is a easygoing man although he looks cool .  
 Person1:        Anything else ?  
 Person2:You can discover interviewer's eyes because they can show his thoughts , and can judge whether he is interested in your words by his gesture and mien . 

informal