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:       Good morning , Miss Cai . Congratulations ! You ’ Ve passed the interview .  
 Person2:Good morning , Mr . Yang . Thank you very much . Can I work now ?  
 Person1:        Oh . Take it easy . As I ’ Ve said in the interview , once you are employed , we ’ ll give you a probation period of three months . And now we need to sign a draft agreement for the probation period .  
 Person2:I am sorry , I am just too excited and forget it . Can I look it through ?  
 Person1:        Of course , here you are . And you can ask me any question .  
 Person2:Well , I am sorry that I have a question . There is no remuneration item in this agreement . Can you tell me something about it ?  
 Person1:        Well , according to the principle of our company , employees like you have no remuneration during the probation period .  
 Person2:But you didn ’ t tell me in the interview .  
 Person1:        I am sorry , it ’ s not decided by me but by the company .  
 Person2:Okay , I can ’ t decide whether sign or not now . Can you give me some time to think it over ?  
 Person1:        Okay . Can you give me a reply tomorrow ?  
 Person2:Yes . Thank you very much . Mr . Yang . 

formal