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'.
Q: Person1: May I help you ?
Person2:I can ' t find the book I want .
Person1: Why don ' t you try looking at the database ?
Person2:I checked it already .
Person1: Do we have it available ?
Person2:It wasn ' t there .
Person1: I guess it is lost .
Person2:Will you be getting another copy ?
Person1: Yes , we will .
Person2:Could you reserve a copy for me ?
Person1: I can do that .
Person2:That ' s great . Thanks a lot .
A:
informal