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:       Thomas , would you be so kind as to lay the table for me ? I'm busy in the kitchen .  
 Person2:Of course ! Where are the things ?  
 Person1:        They're all here .  
 Person2:Right ! I'll do it straight away .  
 Person1:        Thanks a lot . I'm most grateful . 

informal