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: Can I help you ?
Person2:Yes , I'd like to have a look at the 2 - piece suit .
Person1: What size do you wear ?
Person2:Middle size
Person1: Then please look at this suit .
Person2:Does this suit come in other color ?
Person1: Yes , we have some in blue , green , black and brown .
Person2:How much is the brown one ?
Person1: US $ 138 .
Person2:Then I'll take it .
Solution:
informal