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:       Tomorrow will be my first day at work , what do you think I should be wearing ?  
 Person2:Well , if you want to look professional , serious and more conservative , a blue dress , white shirt and not-too-high shoes would be the best choice . But sometimes , very formal clothes will keep you at a distance from your colleagues . It depends on the company ’ s dress code .  
 Person1:        Indeed , I found most of the employees dress casually when I went to the interview . Only the manager was in suit and tie and he just came back from a ceremony . It seems that their dress code is not that formal . Probably , I should put on car key and simple shirt .  
 Person2:Whatever you choose , make sure they are neat and clean . 

formal