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:       When the rain stops , you ’ ll see how beautiful the beach is .  
 Person2:But the rain has been pouring down for two days . We ’ Ve both caught colds .  
 Person1:        And this bedroom is too big and damp . But it ’ s better than a tent .  
 Person2:How unlucky ! Let ’ s pack our bags and go home . 

informal