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:       how was your education going on in Australia ? 
 Person2:I'm going to graduate this summer . 
 Person1:        where are you going to work then , in Australia or back in China ? 
 Person2:I'm planning to return to China after graduation . 
 Person1:        why are you choosing to leave a foreign country ? Many people are reluctant to leave the superior living environment abroad . 
 Person2:well , I think personal development is much more important than simply having a superior living environment . 
 Person1:        yeah , China's developing so fast and development opportunities can be found almost in every corner of the country . 
 Person2:absolutely , many Chinese enterprises are going global , and they are in great need of excellent returnees to help them with their overseas business . 
 Person1:        the rapidly expanding economy has encouraged many students to pack their bags AMD head for home . 
 Person2:that's right . Most of the Chinese students pursuing higher education in Australia intend to return to China . 

formal