Detailed 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'.
Problem: Person1: Hello , I need to register for a class .
Person2:What class are you trying to take ?
Person1: I want to take a Psychology class .
Person2:Well , there are only two classes open .
Person1: Can you tell me what days the classes are on ?
Person2:One class is on Tuesday and Thursday from 2 p . m . to 4 .
Person1: And the other class ?
Person2:That class is from ten to twelve on Monday and Wednesday .
Person1: Are you sure these are the only open classes ?
Person2:Yes , I am sure .
Person1: Okay , sign me up for the class on Monday and Wednesday .
Person2:Very well then .
Solution:
formal