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:       Could I ask the company for the housing ?  
 Person2:Yes , but now we are fresh out of staff quarters .  
 Person1:        How will you solve the problem ?  
 Person2:The company will assign you housing subsidies at 400 yuan a month . 

formal