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:       Well , Betty . Since you ’ Ve done well during the probation period , we decided to employ you formally . And now we need to sign the formal agreement .  
 Person2:Thank you very much , Mr . Smith . I am very happy that I ’ ll be a member of your team . May I see the agreement first ?  
 Person1:        Of course . If you have any questions , just bring them out .  
 Person2:OK , thank you . Well , I find that the salary level in this agreement is not like what you have said in the interview . Can you give me some explanations ?  
 Person1:        Well , it ’ s like this , during your first year , you will enjoy this salary level , a year later , we ’ ll increase your salary by 20 % .  
 Person2:Can we add up this item to the agreement ?  
 Person1:        Yes , maybe the personnel department made some mistakes in making the agreement . Do you have any other questions ?  
 Person2:No , thank you . Shall we sign the agreement now ?  
 Person1:        Yes , welcome to our company . I hope we can cooperate happily .  
 Person2:Thank you . I'll work hard . 

informal