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:       Great party , isn't it ?  
 Person2:Yeah , really , jane and ted always have great parties .  
 Person1:        This is my first , I only met jane last week . she and I teach at the same school .  
 Person2:Oh , so you're a teacher .  
 Person1:        Yeah , history , what about you ?  
 Person2:I'm in the car business .  
 Person1:        Salesman ?  
 Person2:Yes , that's right .  
 Person1:        Oh , I see , by the way , my name's Mary .  
 Person2:Nice to meet you , I'm jim taylor . 

formal