Definition: 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:  Person1:       Do you remember John from head office ? 
 Person2:Yes . 
 Person1:        Have you heard what happened to him ? 
 Person2:No , what ? 
 Person1:        He had his car stolen . Actually he was kidnapped while he was in the car . 
 Person2:What do you mean ? 
 Person1:        Well , apparently , he was just getting into his car-he'd parked it in one of those underground multi-story things-he was just getting in and suddenly three guys with guns opened the back doors of the car and got in . 
 Person2:Crikey . Where did this happen ? 
 Person1:        In Taichung , I think . 
 Person2:Oh , right , I hear they have a lot of this kind of problem down there . 
 Person1:        Really ? Well , anyway , they pointed their guns at him and said , you know , keep calm and drive out . ... we don't want to hurt you ... we just want your car . 
 Person2:So what happened ? 
 Person1:        Well , he drove out , and when he got to the booth to pay the attendant , he pretended to have an epileptic fit , you know , to scare the thieves away . The attendant was no help at all , even though the guys were holding guns in plain view , he did nothing . 
 Person2:That's terrible . 
 Person1:        Yes , makes you think , doesn't it ? 
 Person2:So what happened next ? 
 Person1:        Well , he kept on pretending to have a fit , so they freaked out and just ran away . 
 Person2:Well , he sure was lucky . 
 Person1:        I'll say . 

informal