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 offer a course in business management ?  
 Person2:Yes , we do .  
 Person1:        How many nights a week is it ?  
 Person2:It's 3 nights a week , Monday , Tuesday and Thursday .  
 Person1:        And how long does the course last ?  
 Person2:It lasts for 9 months .  
 Person1:        When does it start ?  
 Person2:The next beginning class starts on October 25th .  
 Person1:        What time is the class ?  
 Person2:From 7 to 9 o'clock .  
 Person1:        How much does it cost ?  
 Person2:It costs 125 dollars a month .  
 Person1:        Yes , that's all right . I want to enroll in the course .  
 Person2:Thank you , please fill out this form for us .  
 Person1:        Do you want me to fill it out now ?  
 Person2:Yes , please . we need a record of you education and your work experiences . 

formal