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'.

Example Input: Person1: Hello , sir . Can I help you ?
Person2:Yes . I want to apply for a job you posted on the Internet yesterday .
Person1: What ' s the job title ?
Person2:Service Technician . How can I apply for this position ?
Person1: You need to fill out an Application Form .
Person2:Where is it ?
Person1: It is on the desk over there . Be sure to fill out everything . Don ' t leave any blank spaces . When you ' re done bring the application to me .
Person2:Okay . Thanks .
Example Output: formal

Example Input: Person1: I'm going shopping .
Person2:Do you have enough money to buy that dress ?
Person1: No . I need to borrow $ 50 .
Person2:Sure , here you go .
Example Output: formal

Example Input: Person1: When can we expect you for dinner ? Can you come tonight ?
Person2:Not tonight . I promised to go to a concert with my sister .
Person1: Well ... How about Friday then ?
Person2:That sounds fine .
Person1: Good . Shall we say seven o'clock ?
Person2:I'll be there . You're still a fabulous cook , aren't you ?
Person1: That'll be for you to decide . I've got a new dish that I want to try out on you .
Person2:I'm ready . I'll look forward to it all Friday !
Example Output:
informal