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: Hello , is Jack there ?
Person2:Speaking .
Person1: Jack ! It ' s Rose here .
Person2:Hi , Rose . How ' s everything ?
Person1: Fine , thanks . I ' m having several friends over for dinner this Saturday . And I was wondering if you have the time to join us .
Person2:Sounds good . What time do you want me to come ?
Person1: Is six o ' clock okay ?

Output: informal

Input: Consider Input: Person1: How did Jim get the money ?
Person2:He borrowed it from Nick .
Person1: He must be mad ! Nick is a loan shark .
Person2:He was too desperate to find some other way .

Output: formal

Input: Consider Input: Person1: You are too picky .
Person2:No , I'm not.Hey , look at that guy over there .
Person1: Which guy ?
Person2:The guy in the blue shirt at the table by the window .
Person1: I can't see him . Where ?
Person2:Right there .
Person1: Oh , I see him now . Wait ! That's ...
Person2:Yes , it's Mel Gibson .
Person1: Oh , wow ! It's really him ! Who is that woman he's with ?
Person2:I don't know . Why don't you go ask for his autograph ?
Person1: I can't do that .
Person2:Why not ?
Output: informal