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:       Good morning . Phyllis Seymour speaking .  
 Person2:Hi , Ms . Seymour ? It ’ s Allan Parker . I ’ Ve been waiting to call you and thank you for all your help last week .  
 Person1:        Thank you very much , Mr . Parker . But , that is my job .  
 Person2:Well , I want to let your boss know that she ’ d better hold on to you ! You ’ re a hard worker ! 

informal