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:       Gino , do you really need to go ?  
 Person2:Yeah , it's must for me .  
 Person1:        But don't forget to give me a ring .  
 Person2:I won't , mom .  
 Person1:        Take care of yourself .  
 Person2:I will . Bye , mom .  
 Person1:        Bye , my boy . 

formal