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: Can I help you ?
Person2:Yes , would you like to tell me what's playing for tonight ?
Person1: Sure . There is a folk concert tonight .
Person2:Are there any good seats left ?
Person1: Sorry . There are only some seats in the back .
Person2:Well , what time does it begin ?
Person1: It begins at 7 p . m ..
Person2:OK . I see .
Person1: How many tickets do you want ?
Person2:Just two .
Person1: OK . Fifty yuan for each .
Person2:Here is the money .
formal