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:       What would you be doing in U . S . A ? 
 Person2:Most of the time I'll be on a tour , enjoying the beautiful scenery there . 
 Person1:        What do you want to see particularly ? 
 Person2:I'll go to the Yellow Stone Park , and Great Canyon . 

formal