You will be given a definition of a task first, then some input of the task.
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: ( Before Christmas Party ) Are you ready for the Christmas party tonight
Person2:Almost . I have to get dressed . It's a formal party and I have special party make up !
Person1: Use this lipstick and it will make your lips shine !
Person2:Great ! Uh , remember that there's a gift exchange , too . We all have to bring a gift .
Person1: I've already got mine .
Person2:( At the Party ) It's Christmas Eve ! Time to open presents !
Person1: Here ! Open mine first .
Person2:Wow ! It's just what I wanted !
Person1: Hey ! Why don't I have any presents !
Output:
informal