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 give me a bonus ?  
 Person2:Yes . We don ’ t give bonus every month , but we offer semi-annual bonuses .  
 Person1:        Do you allow any commission ?  
 Person2:Yes . Commission will be given on the basis of your sales revenue . And the percentage will be 2 % of your total revenue . 

formal