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'.

Ex Input:
Person1: The weather in Beijing is just beautiful !
Person2:Autumn is the best season in Beijing , you know .
Person1: Yes , I can see . The summer heat is over , and the winter cold is still far away .
Person2:What is the weather like in Washington at this time of this year ?
Person1: Autumn is also very nice in Washington .
Person2:Is it very cold in winter there ?
Person1: No , it isn't . But sometimes it snows a lot in winter .
Person2:Does it rain a lot in summer there ?
Person1: Oh yes ! Sometimes it rains very heavily.How about here in Beijing ?
Person2:There's a lot of rain in summer , but it seldom rains in autumn .
Person1: I feel it's rather dry here .
Person2:That's true . Many people from the south don't like the weather here .
Person1: Are you from the south ?
Person2:No , I'm from the north . I was born in Beijing , actually .
Person1: I see.so this is your hometown ?

Ex Output:
informal

Ex Input:
Person1: Are you going to the party on Saturday ?
Person2:I was thinking about it . Are you ?
Person1: Yeah , I heard it's going to be a lot of fun .
Person2:Really ? Well , what time does it start ?
Person1: It starts at 8
Person2:Well , who all is going to be there ?
Person1: Everyone from school .
Person2:How do you know it's going to be so fun ?
Person1: This party is going to have a DJ , food , and drinks .
Person2:Wow , that does sound like it's going to be fun .
Person1: So am I going to see you at the party ?
Person2:Yeah , I will be there .

Ex Output:
informal

Ex Input:
Person1: I want to meet you . Are you free this evening ?
Person2:Well , actually , I'm not free today . Do you have anything urgent ?
Person1: No , I just want to meet you .
Person2:How about tomorrow instead .
Person1: Hmm , that's all right . Shall we meet at the bar near the beach ?
Person2:All right . See you then .

Ex Output:
formal