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'.

Q: Person1: Do you like the Harry potter books and movies ?
Person2:Not really !
Person1: Why not ? They are very fun and exiting .
Person2:Maybe , but I think they are just for kids .
Person1: No , that ' s not true . Many adults like the Harry potter books too .
Person2:Maybe they don ' t agree with my taste .

A: formal
****
Q: Person1: I haven ' t met Bob for years . How is he ?
Person2:He has been keeping bach after divorce .
Person1: He would have recovered from the stress and got married again .
Person2:Once bitten , twice shy . He said he would rather keep bach than to live in disgust .

A: formal
****
Q: Person1: Would you like to go to a concert tonight ?
Person2:I'd like to very much .
Person1: All right , then.There is one at the new concert hall .
Person2:Who's playing ?
Person1: It's the Powell orchestra .
Person2:Do you know what they are playing ?
Person1: They're doing a seventeenth-century program .
Person2:And who is directing ?
Person1: Well , I'm not sure of his name , but I know it's going to be his farewell performance .

A:
formal
****