Instructions: 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'.
Input: Person1: Hello , Fife Computers . How can I help ?
Person2:Hello , this is the Corporate Department of Lincoln Bank calling . We are calling to let you know that some documents have arrived for you at our bank .
Person1: Oh , really ? Do you know which company they are from ?
Person2:They're from Schnitt's of Rudesheim , Germany . Would you like us to check them ?
Person1: What's the charge for that ?
Person2:It's 150 RIB for the service .
Person1: That seems pretty reasonable . Thanks .
Output:
informal