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:       I'll need a parking permit for next semester .  
 Person2:Do you attend school during the day or only at night ?  
 Person1:        I only attend class part-time in the evenings .  
 Person2:Do you drive a motorcycle or an automobile ?  
 Person1:        I have both , but I usually use my car to get to school .  
 Person2:Great , the price for that permit is thirty dollars ; cash , check , or credit card ?  
 Person1:        I'll pay cash .  
 Person2:Do you need to buy a duplicate permit for a second vehicle ?  
 Person1:        No , thank you .  
 Person2:OK , here is your permit ; enjoy the next semester . 

formal