Instructions: 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 may go grocery shopping later .
Person2:We need to get food ?
Person1: I don't think we have any food .
Person2:What are you going to buy ?
Person1: What food are we out of ?
Person2:Go and look in the kitchen .
Person1: Could you look for me ?
Person2:You should just get the basics .
Person1: What would that be ?
Person2:Get some eggs , milk , and bread .
Person1: Would you please make a list for me ?
Person2:Okay , I'll write it down for you .
Output:
formal