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:       Remember that old man who used to beg for money on the street across from our house ?  
 Person2:Yeah . Whatever became of him ?  
 Person1:        He got a job and now he owns a small grocery in town .  
 Person2:That's great . We should visit him some time . 

informal