Definition: 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:       Good morning , can I help you ?  
 Person2:We'd like to buy some furniture for our new house .  
 Person1:        Here are several sets of furniture , including sofa , dressing table , wardrobe , and sideboard . How about this one ?  
 Person2:We like a larger wardrobe . 

formal