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 have any experience working with a computer ?  
 Person2:Yes . I have been a data entry operator for three years .  
 Person1:        What kind of software can you use ?  
 Person2:I have working knowledge of Windows and Dos . Actually , I'm quite familiar with both Java and C + + Programming Languages .  
 Person1:        Do you have any other computer qualifications ?  
 Person2:Yes , I have an ACRE certificate , Bank 2 .  
 Person1:        Do you know how to use a PC to process the management information ?  
 Person2:I'm sorry to say I'm not familiar with processing management information , but I'm sure I could learn quite quickly . It can't be too difficult , and I've got a quick mind . I can handle any problem you give me . 

formal