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: May I speak to Mrs . Liu , please ?
Person2:This is Liu Fang speaking .
Person1: Oh , good morning , Mrs . Liu . I'm calling to see if you have received my resume that I sent to you by Email .
Person2:May I have your name , please ?
Person1: My name is Steven . May I ask whether I can have an interview ?
Person2:Of course . In my opinion , you are the strongest candidate for the job .
Person1: When is it most convenient for me to visit you to talk about the position ?
Person2:I want to set up an interview for you at 9 a . m . next Monday in our company's conference room .
Person1: Thank you very much . See you then .
Output:
informal