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: Mom , you know that Andrea and I sometimes worry about you .
Person2:Really ? Why would you worry about me ? I ' m just fine .
Person1: You ' re almost 70 years old , Mom ! Don ' t you think it would be better for you if you moved in with us ?
Person2:No way ! I like my apartment , and I like to be independent .
Person1: Do you ever get lonely living alone ?
Person2:Not at all . I see you and your family twice a week , and I enjoy seeing my own friends . I ' m too busy to feel lonely !
Example Output: informal

Example Input: Person1: Do you know that John isn't going to come back to our school ?
Person2:Really ? Why ?
Person1: He had moved and held a party on July 1st .
Person2:It's a pity that I was traveling around Europe at that time .
Person1: Even he's not coming back to school anymore , you still can call him and meet him on weekends .
Person2:You're right ! I will call him this weekend and meet him .
Example Output: informal

Example Input: Person1: I heard you are busy with your new house now ?
Person2:Yeah , I want my own house very much , so I decide to buy one .
Person1: Let meet this right do you want to buy the house ?
Person2:Yeah . This is a big house with a garden . I like it very much .
Person1: But it is far from downtown . Living here is very inconvenient .
Person2:It is very quiet and peaceful . This is what I want .
Example Output:
formal