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:       That was a nice funeral .  
 Person2:Yes , dad , it was .  
 Person1:        The son gave a nice speech about his father .  
 Person2:It was long , too .  
 Person1:        I think it was about 45 minutes long .  
 Person2:But it went by fast . It was interesting .  
 Person1:        I liked it .  
 Person2:I'll give you a speech like that , too .  
 Person1:        Do you think anyone will come to my funeral ?  
 Person2:Of course .  
 Person1:        I think only the family will be there .  
 Person2:You have lots of friends . They will be there , too ! 

formal