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: What are you doing to your house ?
Person2:We're redecorating our living room .
Person1: What are you going to do to it ?
Person2:First , we're going to change the curtains , then we're going to paint the walls .
Person1: What colour are you going to paint them ?
Person2:Pale yellow .
Person1: What else are you going to do ?
Person2:We're going to put in some new furniture .
Output:
formal