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'.

Q: Person1: Could you explain the paper-making process to us - in very simple terms - please ?
Person2:Well , the pulp falls from a box onto the first part of the paper machine , which is basically a wire bed with large holes in it , where most of the water is extracted .
Person1: So , is it actually paper at this stage ?
Person2:Yes , it is . But we need to take out more water . So it then passes through a series of rollers , where more water is squeezed out . After that it goes through the dryers , which are at a very high temperature . The paper is then coated . And finally it's wound onto reels and cut down into smaller lengths .

A: formal
****
Q: 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 .

A: informal
****
Q: Person1: What's the matter with you ? You don't look well .
Person2:Nothing . Maybe it is just the weather . Rainy days often make me feel a little sad .
Person1: Really ? I like rainy days . The moisture in the air is good for my skin .
Person2:Sure . But it is too cold today . I have to put on warm clothes and look stupid .
Person1: Me , too . At this time of the year , I often miss my home in the warm south .

A:
formal
****