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: No, that will be all. Thank you! Sentence2: I really like the north. It seems much more peaceful. Sentence3: no, could you just reserve a table for 4 at 11:45 thurs and I'll need the ref # too please Sentence4: Hakka and the hotpot are expensive, golden wok is moderately priced, any preferences? Sentence5: Sure, which part of town do you want to stay in? Sentence6: I also would like to find Chinese food in the north. Sentence7: A table has been booked at Hakka. The reference number is WBYI96YH . Is there anything else I can do for you today? Sentence8: No thank you that will be all Sentence9: Either way is fine with me. What's the phone number? Sentence10: I have two hotels available. I'd recommend the Ashley Hotel. Would you like more information? Sentence11: Their phone number is 01223353888 Sentence12: Could you please find me somewhere to stay? I need a moderately priced hotel but I'm not fussy about parking Sentence13: The Acorn Guest House is 4 stars. Does it need to be a hotel or can it be a guesthouse? Sentence14: Is it a 4 star? If so, can you give me the phone number? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User