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: Before we begin eating , I'd like to present everyone with a gift from Taiwan .
Person2:What is it ?
Person1: It's a Taiwanese puppet doll .
Person2:It's huge !
Person1: Yeah . They're usually this big .
Person2:The craftsmanship is excellent .
Person1: All the parts work .
Person2:Thank you so much .
Person1: Don't mention it .
Example Output: informal

Example Input: Person1: How are Zina's new programmers working out ?
Person2:I hate to admit it , but they're good . And fast . The Filipino kid is a genius .
Person1: So you'll make the Stars.com deadline , and have us up and running next week ?
Person2:It'll be close , but we'll make it .
Person1: Good . After Stars.com starts paying us , we won't need Vikam's cash anymore .
Person2:And if we don't need them , we won't need Zina , either .
Example Output: formal

Example Input: Person1: Julia , what's the weather forecast for tomorrow ?
Person2:It says a storm may come tomorrow .
Person1: Oh ! I hate rainy days !
Person2:Me , too . I'm always in low spirits when it rains . Are you going out tomorrow ?
Person1: Yes . I have to drive to Washington D . C .
Person2:What bad luck !
Person1: Yeah ! But you know sometimes the weather forecast is not correct . Maybe tomorrow is a clear day . Who knows ?
Person2:Yeah , maybe you are right !
Example Output:
informal