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:       Hello , this is David . 
 Person2:Hi David , this is Marge . Can you meet me after work for a few minutes ? 
 Person1:        Sure ! How about the coffee shop right across the street from my office ? 
 Person2:That will work . 
 Person1:        Does five thirty work for you ? 
 Person2:That will be fine . What I have to show you will only take a few minutes of your time . 
 Person1:        Is it the plans for my new house ? 
 Person2:Yes . I just need to double check a few details with you . 

formal