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'.

Person1: Ahh ... What a fine day ! I do feel like an outdoor exercise .
Person2:How about taking a walk in the park ?
Person1: OK.It ' s delightful to have a walk in the park with the air so fresh .
Person2:Oh , it's so quiet here.We have the park to ourselves , only you and me !
Person1: Don't you see many people over there ? Just on your left .
Person2:Oh , I see them.Some are doing Taijiquan , some are performing swordplay , some are practising the Chinese Wushu .
Person1: A growing keep-fit fever is sweeping over China .
informal

Person1: I can't believe it , I had faith in Bob and he let me down .
Person2:I know what you mean .
Person1: Really ?
Person2:Yes , he did the same to me .
informal

Person1: You are friend of Janet , right ? I am Andrew , Andrew Smith .
Person2:Nice to meet you , Andrew . I am Noirin , Noirin O'Neil .
Person1: I'm sorry , I didn't quite catch that .
Person2:Noirin , N-O-I-R-I-N , it's an Irish name .
informal