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 afternoon , Mr . Dome ’ s office . 
 Person2:This is Denise , Mr . Bruce ’ s Secretary . I was calling to confirm his meeting tomorrow with Mr . Dome at 4 o ’ clock . 
 Person1:        Yes , it ’ s confirmed for here in our office . 
 Person2:Is your address still 1150 Lake Road ? 
 Person1:        Yes , that ’ s correct . 
 Person2:Ok . Thank you . 

formal