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:       You look upset , is there anything wrong ?  
 Person2:Yes , to tell you the truth , there is .  
 Person1:        What is it ?  
 Person2:Well , I've lost my wallet and my ID card .  
 Person1:        Oh , that's too bad ! I am sorry to hear that !  
 Person2:Forget it , there is no use crying over the spilled milk . 

formal