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:       So Peter , do you have a favorite comedy ?  
 Person2:Well , that's hard to say because there are so many good ones . I don't think I could pick a favorite .  
 Person1:        You know what comedy I really like ? " Ace Ventura , Pet Detective . " I think Jim Carry is really funny .  
 Person2:Oh yeah , that's one of my favorite flicks . I think Jim Carry is one of the funniest comedians ever .  
 Person1:        I agree . But even though I like comedies , I usually prefer more serious films . My favorite movie is " Titanic . " 

formal