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:       Jodi , I must get a hold of Jim today , but I forgot his address and phone number . 
 Person2:Don ’ t worry about it . I have his pager number right here . 
 Person1:        Really ? You ’ Ve helped me a lot . Thank you . 
 Person2:Forget it . It ’ s nothing . 

informal