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:       You say your products are aimed at the green consumer . In what ways are they environmentally-friendly ? 
 Person2:We produce household cleaning products - detergents and so on . They are all phosphate-free , which minimises damage to the environment . 
 Person1:        What about the packaging ? 
 Person2:We try to use as little packaging as possible . Also , all our bottles are made of recyclable plastic and we use recycled fibre in our boxes . That's what our customers want . 

formal