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:       First of all , thank you for accepting this job .  
 Person2:It ’ s my pleasure .  
 Person1:        What are your salary expectations ?  
 Person2:Would you please tell me about your pay skill first ?  
 Person1:        We ’ ll offer you a monthly salary to begin with , in addition , we offer one percent commission and all your sales . You also enjoy life insurance and health insurance . What ’ s starting salary would you expect here ?  
 Person2:They sum my skills and experience . I ’ d like to start it with 4000 yuan a month .  
 Person1:        That sounds reasonable .  
 Person2:Do I have paid vacation ?  
 Person1:        Yes , you have 2 weeks paid vacation a year , and you get it additional week after 4 years , and then again , after 9 years if you decide to stay that long , we promote from within based on performance , so there is an excellent chance that you could become a sales manager or even a regional manager . 

formal