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: What's the matter ?
Person2:I'm feeling a little under the weather .

Ex Output:
formal

Ex Input:
Person1: How much do you expect to earn ?
Person2:I think salary is closely related to the responsibilities of the job . Shall we discuss my responsibilities with your company first ?
Person1: If you are hired , you are in charge of the design of toys that can meet the needs of the American market .
Person2:I know it is a crucial position , but I can do it well . So I'm asking for 200,000 Yuan a year as a starting salary .
Person1: Ok .

Ex Output:
formal

Ex Input:
Person1: What's wrong , Jerry ? You look so upset .
Person2:To be honest , I was just dumped .
Person1: Oh , I'm sorry to hear that . You can go on a holiday cheer you up .
Person2:No , thanks . I'm not in the mood for traveling .
Person1: Come on . A trip will do you good . Are you doing anything this weekend ?
Person2:I was planning on doing a lot of wallowing .
Person1: Well , my friends and I are planning on going to Shangri-La on Saturday . Do you want to come with us ?
Person2:Where is that ?
Person1: Not very far from here . We'll fly . It's about one and a half hours .
Person2:What's there to see ?
Person1: There is a large canyon , vast grasslands , ancient forests and mountain lakes .
Person2:Oh , sounds nice .
Person1: Yes , the scenery there is breathtaking . I have some pictures at home . You can come over and take a look if you like
Person2:Ok . Then I can make up my mind .

Ex Output:
informal