Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I really have a craving for some good chinese food. Can you suggest a place? Sentence2: Okay thanks! That's all I needed to know! Sentence3: Yes could I get the postcode of the nightclub? Sentence4: Thank you, enjoy your stay in cambridge. Sentence5: I just need one that is moderately priced. Can you just recommend one and give me the phone number please? Sentence6: Sure. The postcode is cb23hx. Sentence7: Sure, did you have anything in mind? We have quite a few free options! Sentence8: The Golden Wok is sensational. The phone number is 01223350688. Can I help you with anything else today? Sentence9: That is all I needed, thank you. Good bye. Sentence10: Could you recommend me some places to go that is in the centre? Sentence11: I enjoy The fez Club, it's a nightclub in the centre. It has a 5 pound entrance fee. Is there anything else I can help you with today? Sentence12: Thank you for using our service. have a good day! Sentence13: Oh anything would do really, just needs to be in the centre. Sentence14: I sure can! We have 17 wonderful chinese places, is there a particular area or price range you have in mind? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User