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:       Have you seen the news that there is a serious flood in the South ?  
 Person2:Yes . I've got to cancel my traveling plan .  
 Person1:        What a pity ! I know you've been longing for it these months .  
 Person2:The only thing I can do now is waiting for another chance . 

informal