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'.

Example Input: Person1: Are you almost finished with my hair ?
Person2:I'm almost finished .
Person1: How much longer is it going to be ?
Person2:I'm done now . Do you like it ?
Person1: I absolutely love it .
Person2:You really like it ?
Person1: Yes , I truly do .
Person2:I'm glad you like it .
Person1: How much do I owe you ?
Person2:It's going to be $ 55 .
Person1: Here you go , thanks for everything .
Person2:Make sure and come back in a couple of weeks .
Example Output: informal

Example Input: Person1: Ugh . Another advertisement . They ' Ve added two hours of advertisements to a two hours movie .
Person2:Yeah . We ' re never going to get to the end of this one .
Person1: Why are we watching it anyway ?
Person2:Well , it does have a lot of girls in it .
Person1: True . True .
Person2:Do you think Bruce Willis just drank a Coke for his health ?
Person1: Really ? Did Coke pay him for that ?
Person2:Of course .
Person1: You want something to drink ?
Person2:Yeah , Got a Coke ?
Person1: Sure .
Person2:Hurry , the movie is coming back on .
Example Output: informal

Example Input: Person1: Do you need help with something ?
Person2:I need help finding a new refrigerator .
Person1: Do you see anything that you like ?
Person2:That Kenmore looks nice .
Person1: That is a wonderful choice .
Person2:What makes is so great ?
Person1: It's very inexpensive , and it has all the appliances .
Person2:What appliances are you talking about ?
Person1: The fridge and freezer is very spacious , and it also has an ice maker and water dispenser .
Person2:May I take a look inside ?
Person1: Take a look inside .
Person2:It's very nice . I'd like to purchase this refrigerator .
Example Output:
informal