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 heard you are going to move .
Person2:Yes , I found a better house near my office . I ' m very satisfied with it . But I ' m worrying .
Person1: What are you worried about ?
Person2:I ' m worrying about how to move all of my household stuff . You know , I have a lot of stuff .
Person1: You can call a mover .
Person2:How much dose that cost ?
Person1: Around 200 RIB for a truck .
Person2:I think it ' s a little expensive .
Person1: But think about it , you just need to pack your stuff and leave everything for the movers , how much trouble you will save .
Person2:That ' s right .
Person1: I know a mover which has a very good reputation for their service . I ' ll leave you their phone number .
Person2:Wonderful .
Person1: It ' s 8357688 8 .
Person2:Okay , thanks a lot . You did me a great favor just now .
Person1: You ' re welcome .
Output:
informal