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:       We are doing ' Secret Santa ' at the office again this year .  
 Person2:Whose name did you pick ?  
 Person1:        I got Jacob . Any ideas what to get him ?  
 Person2:Booze !  
 Person1:        Yeah , you ’ re right . Can ’ t go wrong with that . 

informal