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:       I enjoyed talking to you .  
 Person2:I enjoyed talking to you too .  
 Person1:        We should hang out some time .  
 Person2:I think that would be nice .  
 Person1:        Is there anything you would like to do next time ?  
 Person2:Do you want to go out to eat ?  
 Person1:        I'd like that .  
 Person2:So I'll see you next time .  
 Person1:        I'm going to call you soon .  
 Person2:I'll talk to you later .  
 Person1:        See you soon .  
 Person2:Goodbye . 

informal