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:       Can you tell me the results of my home inspection ?  
 Person2:Before I answer that , I want to make sure that you know what I was looking for . Are you clear on what I was looking for ?  
 Person1:        I never had a home inspection before .  
 Person2:I inspect the home for problems that might not be all that apparent in a quick walk-through .  
 Person1:        I asked the owners , and they said that everything was great with the house .  
 Person2:The owners might not be aware of everything wrong with the house . Some things are hidden , but might still be a problem for you in the future .  
 Person1:        I heard that the owners must fix all of the problems before the escrow closes .  
 Person2:I inform you of the problems . If there are major problems , you can decline to buy the house or they may wish to fix any problems .  
 Person1:        What kinds of things did you discover in my home inspection ?  
 Person2:I found some fairly major problems . A major support beam in the roof is broken , and the shower floor leaked and rotted out the second-floor joist . 

formal