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: Do you take reservations ?
Person2:Of course . Reservations aren't necessary , but we recommend them as our restaurant can get quite busy .
Person1: I need a table for two for tonight .
Person2:What time ?
Person1: We'd like to be seated at 8p m .
Person2:Smoking or non ?
Person1: Non-smoking .
Person2:What name is the reservation under ?
Person1: My name is Paul .
Person2:Ok . Please arrive at seven forty-five . We can only hold the table until 8,15 .
formal