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:       Can you believe that Obama is our new President ? 
 Person2:I ’ m so happy about that . 
 Person1:        Did you vote for him ? 
 Person2:I sure did . How about you ? 
 Person1:        I voted for him . 
 Person2:I have complete confidence in our new President . 
 Person1:        Is that right ? 
 Person2:I know he will help change America . 
 Person1:        I hope so , because America needs a change . 
 Person2:I feel like things are already changing , because he was elected . 
 Person1:        I agree with you completely . 
 Person2:I ’ m not worried about our country now that it ’ s in his hands . 

informal