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:       Kate , what do you like to do tonight ? Do you often go to the movies ?  
 Person2:Of course . I often go to the movies .  
 Person1:        There ’ s a good movie called Summer in Beijing .  
 Person2:I heard it ’ s a very good movie .  
 Person1:        Let ’ s find out what time it starts .  
 Person2:Let ’ s look at the newspaper .  
 Person1:        Here it is . It starts at 8 o'clock .  
 Person2:Wonderful . I ’ m so excited . 

informal