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:       Mark ! I was wondering if you finished that presentation you were working on last week ?  
 Person2:Just about . It should be done in the next couple of days . Why ?  
 Person1:        Mr . Rodriguez was asking me about it yesterday .  
 Person2:I ’ ll give him a call . 

formal