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'.

Ex Input:
Person1: It seems so strange to be here , burying you , but it's not you .
Person2:Ashes to ashes and dust to dust ...
Person1: This has been the worst and best day of my life , Taylor . They kept you in the hospital , and ...
Person2:I'll tell you all about it another day .
Person1: But you're OK ? It was nothing serious , was it ?
Person2:You ladies look very elegant in black . But I don't want you to wear black in my honor for a long time yet to come ...

Ex Output:
informal

Ex Input:
Person1: Happy New Year , Bill .
Person2:Happy New Year , Steven .
Person1: Do you have any plans for the New Year holiday ?
Person2:My whole family are going to Hainan for visiting . What about you ?
Person1: How happy you are ! I have to stay at home to prepare my final exam .

Ex Output:
informal

Ex Input:
Person1: Which countries have you been to ?
Person2:I ' Ve been to most of the countries in Europe , several countries in asia-china , Japan , korea , and Thailand-and to the united states and Canada .
Person1: I thought you had been to Australia too .
Person2:No , but I ' m planning on visiting Australia and new Zealand soon . I ' Ve heard that they are beautiful countries . Which is the most beautiful country you ' Ve been to ?
Person1: I think I ' d say norway . It has many picturesque fjords , waterfalls , and mountains .
Person2:Isn ' t it really cold there ?
Person1: Well , the north of Norway is almost always cold , but further south it can be fairly warm in summer . It ' s a wet country , so there ' s snow almost everywhere in winter .
Person2:I ' Ve been to other Scandinavian countries , but not to Norway . Perhaps I should go and do some winter sports there .

Ex Output:
formal