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:       Do you have any sales experience ? 
 Person2:Yes , I worked in a fashion shop as a part time salesgirl . 
 Person1:        What kind of work are you doing now ? 
 Person2:I'm working as an export sales staff member for a trade company . 
 Person1:        Where are you working ? 
 Person2:I work at Yangshi Trade Company Ltd . I have been working there since 1997 . 

formal