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:       Do you take in students ?  
 Person2:Yes.If you don ’ t mind sharing room , there ’ s one available .  
 Person1:        How much is it ?  
 Person2:$ 30.00 a week .  
 Person1:        Do you think I could have a look at it , please .  
 Person2:I ’ m on my way out now.Could you come back in an hour ? 

formal