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:       May I ask you how much this position pays per year ?  
 Person2:This job pays sixty-five thousand dollars per year .  
 Person1:        What kind of benefits does this job have ?  
 Person2:This job provides full medical , dental , and disability .  
 Person1:        What type of vacation time do we get ?  
 Person2:You get 3 weeks paid vacation that you may use as you wish .  
 Person1:        Do we have a 401K ?  
 Person2:We offer a 401K with some matching funds available depending on length of service .  
 Person1:        What type of professional development do you offer ?  
 Person2:We provide up-to-date training on state of the art equipment .  
 Person1:        Where do I sign up for my benefits package ?  
 Person2:Down the hall . I'll show you when the interview is over . 

formal