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:       What time is it , Tom ? 
 Person2:Just a minute . It ’ s ten to nine by my watch . 
 Person1:        Is it ? I have no idea if I ’ m so late . I must be off now . 
 Person2:What ’ s the hurry ? 
 Person1:        I must catch the nine-thirty Train . 
 Person2:It ’ s plenty of time yet . The railway station is very close . It won ’ t take your twenty minutes to get there . 

formal