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:       Where shall we go on vacation this summer ? 
 Person2:Well , that depends . Tell me where you want to go ? 
 Person1:        Venice . I have great interests in the boats . 
 Person2:That's interesting to travel by boat to see the whole city that is between the sea and sky . But personally I like Greek better . 
 Person1:        I like the country too . It's quite famous for its culture . 

formal