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:       Ms Anderson , my name is Mike . I am Division Chief of ABC Company . Welcome to Toronto . 
 Person2:Thank you . It's a pleasure to meet you . 
 Person1:        A pleasure meeting you as well , the flowers are for you . 
 Person2:Thank you , they are beautiful . 

informal