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 decided to give it a go ! 
 Person2:Good for you . What items did you bid on ? 
 Person1:        A DENY shirt and one of Serena Williams ' used tennis rackets ! 
 Person2:Your idol ! Wow ! You're even better at finding stuff than me ! 
 Person1:        Yep . I placed a bid for the shirt . The minimum was ten so I bet fifty ! 
 Person2:That's not how this game works . 
 Person1:        Well , there was a sign that said “ Buy now for seventy . ” 
 Person2:How many bids had been placed before you ? 

informal