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 think it's high time we had lunch .  
 Person2:Of course . I can eat a horse now .  
 Person1:        I am sorry for that . I was so attracted by the beautiful scenery .  
 Person2:Where shall we go now ? A Chinese restaurant or a local one ?  
 Person1:        I suppose the local one . 

informal