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's the time now ?  
 Person2:Sorry , I don't know , there's something wrong with my watch .  
 Person1:        You've simply forgotten to wind it up , have you ? When do you usually wind it up ?  
 Person2:In the coming , before going to work .  
 Person1:        You got up so late today . You have , I think . Turn on the TV and set your watch by it .  
 Person2:OK . I'll turn it on .  
 Person1:        All right . It's just four o'clock .  
 Person2:Well , I'm setting my watch at four . Thank you .  
 Person1:        You are welcome . 

informal