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:       Tom , hi , this is Mary with Gold Star Mortgage . 
 Person2:Yes , Mary ? 
 Person1:        We'd like you to come to work for us . 
 Person2:Oh . I'm sorry but I just accepted another offer which I feel is better suited to my needs . 
 Person1:        I see . 
 Person2:I really appreciate the offer , but I must decline it . 
 Person1:        Please call us if you change your mind . 
 Person2:I will , good luck . 

formal