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'.

Ex Input:
Person1: I hear you bought a new house in the northern suburbs .
Person2:That ' s right , we bought it the same day we came on the market .
Person1: What kind of house is it ?
Person2:It ' s a wonderful Spanish style .
Person1: Oh , I love the roof tiles on Spanish style houses .
Person2:And it ' s a bargaining . A house like this in river side costs double the price .
Person1: Great , is it a two bedroom house ?
Person2:No , it has three bedrooms and three beds , and has a living room with a twelve-foot ceiling . There ' s a two-car garage .
Person1: That ' s a nice area too . It ' ll be a good investment for you .
Person2:Yeas , when will you buy a house ?
Person1: Not untill the end of this year , you know , just before my wedding .
Person2:Right , congratulations .
Person1: Thank you .

Ex Output:
informal

Ex Input:
Person1: One family skeleton of my family was that my younger brother has an axe to grind .
Person2:What did he aim at ?
Person1: He began to be interested in finance because he thought he would be able to inherit the family ' s fortune .
Person2:How could he have such an ill intention ? I think your father can see that through .

Ex Output:
formal

Ex Input:
Person1: I want to know how to buy something from this machine .
Person2:Yeah , the new ones can be tricky . What are you trying to buy ?
Person1: I want to buy one of those snack things .
Person2:Are you ready to go ?
Person1: I'm clear so far .
Person2:The money goes in the slot over there . It has to be smooth to go in .
Person1: It won't go in !
Person2:Just remember that you might have to feed the money in a couple of times to get it to work .
Person1: Yes , next step .
Person2:Make your selection and hope for the best . Vending machines aren't all that reliable .
Person1: They're totally unreliable .
Person2:You seem to have it down . Have a good day !

Ex Output:
informal