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: Hi , happy new year !
Person2:Hey , the same to you !
Person1: Time flies ! One year has already been a history !
Person2:Definitely , it's time to say bye-bye to the last year and to say hello to the new year !
Person1: Yeah . Have you made any good resolutions for this new year ?
Person2:Some resolutions ? That's a wonderful idea , but I have no idea yet . How about you ?
Person1: I want to be healthier this year , so I think I should take more exercise .
Person2:That will be a good one ! Anything else ?
Person1: Maybe I should make a plan about learning my biochemistry , which is a mess !
Person2:Sounds great !
informal