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:       Mary , today a man from an intermediary gave me a call . 
 Person2:What did he say ? 
 Person1:        He said he saw my job-seeking information on the Internet , and could offer me an appropriate job . 
 Person2:What kind of intermediary is it ? 
 Person1:        It's a recruiting agency which specializes in introducing talented people to companies and businesses . 
 Person2:What job did he recommend to you ? 
 Person1:        It's on telemarketing . 
 Person2:Does he ask you to pay some fees ? 
 Person1:        No , he said the employers will pay for it . 
 Person2:Then what do you think about it ? 
 Person1:        I feel it is OK and I want to give it a try . 
 Person2:Sure , but you must verify that first and don't easily make a promise . 
 Person1:        Of course , I will . 
 Person2:Good luck ! 

formal