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 type do you have in your mind ?  
 Person2:A compact please . What's the daily rate for that car ?  
 Person1:        Thirty dollars a day .  
 Person2:Does the rate include the cost of gas ?  
 Person1:        No , you have to pay it by yourself . 

formal