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:       Hi Julie , how are things going ?  
 Person2:Everything is great , Tad . How are you ?  
 Person1:        I'm doing really well .  
 Person2:Tad , I'm pretty hungry right now . Want to walk over and check out the food table ?  
 Person1:        Julie , do you know who that woman is over there by the window ?  
 Person2:That is Mary . I heard that she's just moved in with Lee .  
 Person1:        I thought that he was with Malia .  
 Person2:Oh , that relationship is history . Malia hooked up with a guy she met on holiday .  
 Person1:        I bet that Lee wasn't too happy with that !  
 Person2:Actually , he was OK with it . They hadn't been getting along too well . 

informal