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: What's the matter ?
Person2:I'm feeling a little under the weather .
Example Output: formal

Example Input: Person1: Hello . I'd like to get a seat to New York City on a flight leaving sometime before this Friday .
Person2:I'm afraid Thera isn't any direct light before Friday . What about a non-direct one ? You have to make a change in Detroit .
Person1: Well , in that case , that's fine . I want a first class ticket on Thursday .
Person2:Would you like to pay in cash or by card ?
Person1: Cash , please .
Example Output: formal

Example Input: Person1: Hi , John , how was your vacation ?
Person2:Awesome , we went to Australia and New Zealand .
Person1: That must have been wonderful . Do anything interesting ?
Person2:Well , we went bungee jumping when we were in Australia .
Person1: Wow ! Isn ' t that dangerous ?
Person2:A little , but the rush was worth it .
Person1: Tell me about it .
Person2:We jumped off a bridge and fell 500 feet before the bungee cord caught us .
Person1: 500 feet ! I would never be able to do that .
Person2:Yeah , it was scary , but exhilarating .
Example Output:
informal