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 , this is my claim tag . Can I get my baggage ?
Person2:Let me see . En . Here is your baggage .
Person1: Thank you . And where can I get a pushcart ?
Person2:Walk ahead a little further . There are plenty of them .
Example Output: formal

Example Input: Person1: Are you excited about your trip next month ?
Person2:Yes and no . I can ' t wait to go to Europe , but at the same time I am terrified .
Person1: Why ?
Person2:Well , I have acrophobia . I have a chronic fear of flying .
Person1: Oh really ? I have an uncle who is also terrified of flying . It ' s not that bad though , I mean , it is pretty scary to be in this big machine flying through the air at seven hundred miles per hour . I actually have arachnophobia .
Person2:You ' re scared of spiders ? I actually have two more phobias . Acrophobia and glossophobia .
Person1: I guess that explains why you are afraid of flying , but public speaking is not that bad .
Person2:Are you kidding ? When I get on stage , my palms start to sweat , I get really nervous and I can hardly speak .
Person1: Well , I must confess I am a bit claustrophobic . I hate being in an elevator for more than 5 seconds .
Person2:We are such weirdos right ?
Example Output: informal

Example Input: Person1: Okay , can I ask you something direct ?
Person2:Ha ! It's not like you've ever been one to beat around the bush .
Person1: Fair enough . Give it to me straight . Did she bully you into this ?
Person2:No , seriously . . . I really want this .
Person1: I tell ya , when I got the invite , it really threw me for a loop . You've done a complete 180 .
Person2:I know . But things have changed . I guess I've settled down .
Person1: I guess so .
Example Output:
formal