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:       Don ’ t you think it would be an idea to name the ship Dolphin ? 
 Person2:All right , if that would make you happy . 
 Person1:        So you ’ Ve got something on your mind , I guess . 
 Person2:Well , nothing really serious . 

formal