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'.

Example Input: Person1: I wouldn't dare go bungee jumping .
Person2:Chicken !
Example Output: informal

Example Input: Person1: Is this the A housing office ?
Person2:Yes , it is . Are you looking for housing for this semester ?
Person1: I was hoping to get into something on campus , but my friend told me that everything is full .
Person2:It is , but I can put you on a waiting list , if you would like .
Person1: Please . And in the mean time , can I look at apartments available in the area from this office ?
Person2:Yes , here is a catalog that is put out every year with locations that meet campus requirements for As .
Person1: Who do I talk to if I want I to see some of them ?
Person2:The individual landlord's numbers are next to each entry . You can call them with any questions you may have .
Example Output: formal

Example 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 .
Example Output:
formal