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:       Congratulations on the new house !  
 Person2:Thanks ! We love it .  
 Person1:        Well , you guys worked hard for it . It's really beautiful .  
 Person2:I'm just not looking forward to cleaning it ! 

informal