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:       Do you think I should turn down his offer ? 
 Person2:Yes , it's the correct thing to do . 
 Person1:        But we may not get another partner . 
 Person2:Even so , we can't do business with him.he ' s not reliable . 

informal