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: Consider Input: Person1: Did you tell others that we are getting married soon ? You have such a big mouth !
Person2:I am so sorry about that . It was just a slip of the tongue .

Output: formal

Input: Consider Input: Person1: Did you hear about Neil ?
Person2:No , what ?
Person1: I hear that he's quitting .
Person2:You're kidding !
Person1: I'm afraid not ! Now this is just between you and me .

Output: informal

Input: Consider Input: Person1: Cindy , I have this room to myself ?
Person2:It's all yours .
Person1: It's twice as big as my room in Taiwan !
Person2:Well , I hope it's comfortable enough for you .
Person1: I think I'm going to like it here .
Person2:You have a phone on the bedside table that you can use .
Person1: Wow , I have my own bathroom !
Person2:Kind of . It leads to my bedroom .
Person1: We share the same bathroom , in other words .
Output: informal