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:       Is there anything I can do for you ?  
 Person2:I would like to go to Europe for a visit ? Can you recommend me an interesting city ?  
 Person1:        Why not go to Paris ? It's famous for Arch of Triumph , Eiffel , versailles and place de la Concorde .  
 Person2:Do you have a package tour to Paris ?  
 Person1:        Of course , we have . 

formal