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:       So you're traveling around the world , aren't you . 
 Person2:That's right 
 Person1:        When did you arrive here ? 
 Person2:Last night 
 Person1:        Did you have a good journey ? 
 Person2:Yes , I enjoyed it very much . 
 Person1:        Where have you been on this trip ? 
 Person2:Let me see . Ah , yes , I've been to England , France , Germany , Italy and now I've been in Spain 
 Person1:        Really ? How long will your holiday last ? 
 Person2:Two weeks 
 Person1:        All these countries in two weeks ? 
 Person2:That's right 

informal