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:       Good afternoon , you look a little stuck . Can I help ?  
 Person2:The thing is , I've got all of this information here , all of these leaflets , but I can't make head nor tail of them !  
 Person1:        I see . What is it exactly that you are interested in ?  
 Person2:I'm not sure which would be better for me ; buying some insurance or putting my money in a Savings Deposit .  
 Person1:        Well , that all depends on how much you want to invest .  
 Person2:I was thinking of around 10,000 RIB .  
 Person1:        That's a nice round figure to deal with ! OK , if you were to buy this insurance policy , your yearly fixed income from it would be 94.35 RIB .  
 Person2:And for the Savings Deposit ?  
 Person1:        For the Savings Deposit you could actually get more . You see , in time deposit , the interest rate is 1.58 % after the 20 % interest tax . So , technically you could get more than a third more .  
 Person2:Wow ! A third more ? Very good . 

informal