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 , Stephanie . I hear you have a new job . 
 Person2:Yes , I'm teaching math at Lincoln High School . 
 Person1:        So how do you like it ? 
 Person2:Well , the salary is a little low , but the students are nice . How are things with you ? 
 Person1:        Not bad . You know I'm an air traffic controller now . 
 Person2:Now that's an exciting job ! ! ! 
 Person1:        Yes , but it's very stressful . 

informal