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: Consider Input: Person1: I really hate to say this , but don't go away mad , just go away .
Person2:I knew this would happen some day .
Person1: Then , why didn't you try to prevent it in the beginning ?
Person2:Well . It's not all my fault , Anna . You are responsible , too .
Person1: I don't want to argue anymore . Please get out of my life !
Person2:I think we can still talk .
Person1: No way ! Please don't follow me around .
Person2:Talk it easy , Anna . You really don't hate me . do you ?
Person1: Yes , I do . Leave me alone !

Output: informal

Input: Consider Input: Person1: What color is your new dress ?
Person2:It is green . Come upstairs and see it .
Person1: Thanks you .
Person2:Look ! Here it is !
Person1: That ' s a nice dress . It ' s very smart .
Person2:My hat ' s new , too .
Person1: What color is it ?
Person2:It ' s the same color . It ' s green , too .
Person1: That ' s a lovely hat .

Output: informal

Input: Consider Input: Person1: Hey Michelle , jump in quick . It's pouring out there !
Person2:Oh , hi Melissa . Are you going to the conference too ? I was planning to pick up Mr . Campbell .
Person1: Yes , he told me . We need to pick him up at his hotel and then go to the conference .
Person2:Oh I see , okay . So I heard you got married . Congratulations !
Person1: Ah thank you ! I'm very excited . We were going to get married next year , but then we decided to get married on holiday instead . It was wonderful .
Person2:That sounds so romantic ! Jack and I were hoping to get married in Europe next year , but we had to postpone our plans . We just don't have the money !
Person1: I know what you mean . I think Shanghai is getting more and more expensive , don't you ?
Person2:I sure do . In my opinion , it's actually becoming more expensive than back home .
Person1: Definitely . Oh , there's Mr . Campbell . Driver , can you stop here please ?
Output: informal