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:       Now please tell me something about your past work achievements .  
 Person2:All right , madam . When I was sales manager at the Beijing Friendship Store . I succeeded in raising the yearly sales volume by 25 percent and profit margins from 50 percent to 80 percent .  
 Person1:        That is quite an achievement ! Do you consider it your most rewarding work experience ?  
 Person2:I don't think so . I'll create further achievement in the future .  
 Person1:        Have you received any honors ?  
 Person2:Yes . I got the title of Advance Worker in 2006 .  
 Person1:        Do you have any publications ?  
 Person2:Yes . I wrote a thesis entitled On Interpersonal Relations in the Socialist Market Economy and it was published in China Daily . 

formal