Q: 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'.
Person1: Did you see who the suspect was ?
Person2:I got a perfect look at the suspect .
Person1: Would you be able to pick him out of a line-up ?
Person2:That'll be easy .
Person1: Please take a careful look at these five men .
Person2:Okay .
Person1: Is the suspect in this line ?
Person2:I see him .
Person1: Which number is he ?
Person2:The suspect is number four .
Person1: Your cooperation is very much appreciated .
Person2:I'm happy to be of assistance .
A:
informal