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:       I heard you're getting married , James . Congratulations !  
 Person2:Thank you , Wendy . I hope you'll be able to make it to the wedding .  
 Person1:        I'm looking forward to it . 

informal