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:       Could you drive me to the bank ? 
 Person2:Of course , ma'am , Tell me where to go . 
 Person1:        Go down this road and then turn left . 
 Person2:All right.There we go . 

informal