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:       Lodge , You must come around sometime , You have to check out my mew stereo . 
 Person2:Sure , When is good time for you ? 
 Person1:        Can you make it on Tuesday ? 
 Person2:What time do you want me there ? 
 Person1:        Anytime after six will be fine . 
 Person2:All right , It's a date . 

formal