Given the task definition and input, reply with output. 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: What would you like to order ?
Person2:I would like to have a hamburger .
Person1: Did you want it with cheese ?
Person2:I don't want cheese on it .
Person1: Did you want anything to drink ?
Person2:I think I'm going to get a soda today .
Person1: What kind of soda can I get you ?
Person2:A Sprite sounds good .
Person1: What else would you like ?
Person2:Let me get a bag of chips too .
Person1: Anything else ?
Person2:That's all .
formal