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'.

[Q]: Person1: My uncle gave me this bicycle as a birthday present . Look !
Person2:So cool ! Can I get a load of it ?
[A]: informal

[Q]: Person1: Good afternoon.Swiss Airline.Miss Grown speaking . Can I help you ?
Person2:Yes . I'd like to make a reservation to Los Angeles on Sep . 19th .
Person1: Just a moment , please . Let me check for you . ( A moment later ) Thank you for waiting . I am sorry but our flights are fully booked on that day.The next available flight leaves at 4:00 pm on 20th . Shall I reserve you a seat on it ?
Person2:Yes , please , thank you .
[A]: formal

[Q]: Person1: Did Roll win the race ?
Person2:Yeah , he did . But he only won it by a hair's breadth .
Person1: But anyway , he won at last .
Person2:Yeah . To win is the most important thing .
[A]:
formal