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 morning , and welcome to our bank . What can I do for you today ? 
 Person2:I need some advice about my fixed deposits . 
 Person1:        What seems to be the problem ? 
 Person2:No , no problem . It's just that one of them is due and I'm not sure how to deal with it . 
 Person1:        I see . Well , you have two choices ; you can renew it or redeem it . Which would you prefer ? 
 Person2:Mmmm ... well , I am happy with your service so far , so I'd like to renew it , please . 
 Person1:        Not a problem . But may I just inform you that we have introduced a new service called Account Renewing upon Maturity ? 
 Person2:Yes ... 
 Person1:        You see , that means when anything is up for renewal , we do it automatically and you don't have to physically come here to sort it out . All you need to do is sign here and we'll set it all up for you . 
 Person2:That's just perfect for me . I live pretty far from the centre and it can be a chore getting in . 

formal