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'.

Example Input: Person1: Our philosophy teacher is very humorous .
Person2:I usually have the wrong notion that he's very serious .
Person1: No , not at all.The examples he gives are very interesting .
Person2:No wonder when I pass your room , I always hear your laughter .
Example Output: informal

Example 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 ...
Example Output: informal

Example Input: Person1: I need to find a new place to live .
Person2:Yeah ? Why ? Don ' t you like living with me ?
Person1: Oh , it ' s not you . I just want my own place .
Person2:Well , check the newspaper .
Person1: Jeez ... I didn ' t realize a single bedroom apartment went for so much these days .
Person2:Yeah , prices have really gone up the past couple of years .
Person1: Oh , here ' s one . It ' s looks like its in this neighborhood , $ 600 a month . That ' s not to bad .
Person2:No , it ' s pretty good . Why not give the landlord a call ?
Person1: Hello . I ' m calling about the one bedroom in Lincoln Park . Could I take a look at it ? Yes . Tonight at six is fine . Thanks .
Example Output:
informal