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:       Hi , I'm here to look at the one-bedroom apartment you have for rent . 
 Person2:Okay , come right this way . 
 Person1:        ( They walk over to the apartment . ) As you can see , it's large and completely furnished . 
 Person2:What bills are included in the rent ? 
 Person1:        You have to pay the electricity bill yourself , but water is paid . 
 Person2:Well , I guess for $ 400 a month I shouldn't expect an all bills paid apartment . 

formal