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:       What do you think of the former champ ?  
 Person2:There were some bad misses in his defence , so he lost it .  
 Person1:        No champion can remain at the top for ever .  
 Person2:I suppose he's not in top form . 

formal