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: Jane's mother always wants her to marry a big shot . J
Person2:That is just wishful thinking . The cost of higher education has increased in recent years , faster than the cost of living . So she wants Jane's brother to go on studying and earn his doctorate by means of it .
Person1: But it's unfair for Jane .

Ex Output:
informal

Ex Input:
Person1: Now I know why I split up with Mike . We found we were simply not good for each other .
Person2:In what ways ?
Person1: Well , he is a typical Sagittarius guy , while I am a Cancer . We aren't really compatible
Person2:Ha-ha , so you believe in astrology ?
Person1: What's strange about that ! As a person born under the sign of Cancer , I am home-loving and wish for a peaceful family life . But according to astrology , Sagittarius guys are too adventurous and risk-taking.They seldom think of leading a settled and peaceful life .
Person2:Is that so ? I'm afraid it is too narrow-minded to judge people using astrology . It's all stereotypes !
Person1: But in my case , the fact matches the theory . Mike is humorous , energetic , always as fresh as a daisy , but probably too ambitious . It frightens me !
Person2:But as far as I remember , you two caught on like a house on fire when you first met .
Person1: Exactly . But later on , he cares more about his career than love . Work seems to be the better all , and all for him-so much that he doesn't even grudge sparing a day out with me .

Ex Output:
informal

Ex Input:
Person1: May I help you ?
Person2:Yes , can I cash my traveler's check here ?
Person1: Of course , we'd be happy to cash it for you .
Person2:What's the cashing rate ?
Person1: Well , it's listed on the electronic board on the left . We cash it at present traveler's check buying rate .
Person2:Oh , I see . How much it the service charge ?
Person1: The service charge is 1 % of the total amount of the check .
Person2:Well , I'd like to cash these four checks for $ 100 each .
Person1: Would you please countersign them here ?
Person2:OK , there you are .
Person1: And your passport please .
Person2:Oh , I forgot to bring it . It is in my hotel room .
Person1: Sorry , sir . We can't cash the checks for you without your passport .
Person2:Well , thanks . I will come again this afternoon , then .

Ex Output:
formal