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:       Hello . Can I speak to Kevin , please ?  
 Person2:This is Kevin .  
 Person1:        My name is Joan Harris . I ’ m calling from St . Johns Hospital . Are you still interested in a job as a service technician ?  
 Person2:Yes .  
 Person1:        I have good news for you.You ’ Ve got an interview . Can you come to the Human Resources Office on Thursday at 9 30 am ?  
 Person2:wow ! That ’ s great . Sure , I can . Where is the Human Resources Office ?  
 Person1:        345 Stony Creek Avenue .  
 Person2:Thank you very much . I ’ ll be there on time .  
 Person1:        Excellent . I ’ ll see you on Thursday at 9 30 . 

informal