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:       If we employ you , what starting salary would you expect ?  
 Person2:I'd like to start at 3000 yuan a month .  
 Person1:        I think your background and experience are worth the compensation .  
 Person2:Does it include bonuses ?  
 Person1:        No , there are annual bonuses , one week paid vacation a year , and health insurance .  
 Person2:Very good . 

informal