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:       Did you find what you were looking for ?  
 Person2:I tried when you had gone , but I had no luck .  
 Person1:        Okay , let's both look for it now .  
 Person2:Okay . 

formal