You will be given a definition of a task first, then some input of the task.
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'.

Person1: Why did you buy that painting ?
Person2:I think it's beautiful . I want to hang it in the living room .
Person1: It looks like some kind of mistake .
Person2:That's the beauty of it the imperfection .
Person1: Oh . Who is the artist ?
Person2:Your daughter . She sold it at the school auction .
Person1: Oh ! How about we hang it over here where everyone can see it ?
Person2:I guess you see the value in it , too .
Output:
informal