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:       I went to visit a customer in IVS Company the other day . Their offices were very impressive , especially their company Logo which is all over the place . There are Logo models in metal , copper , clove , paper . They are even printed on the wall paper and the balls of the table-lights . It is really decorated identity .  
 Person2:It is just too much . Don ’ t you feel it is an exaggerating style to decorate offices in that way ?  
 Person1:        Not at all ! I like the design so much . The designer must have thought really hard to come out with such a brilliant concept .  
 Person2:Wow , I doubt that . 

formal