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: There are four expensive Chinese restaurants in the centre of town. Would Ugly Duckling suit you? Sentence2: No that's all, thank you! Sentence3: Yes, I'd like the address please. Sentence4: Yes, I know it would work, I am the one you asked, lol. Can you just give me the address and phone number though? Sentence5: You're welcome, have a great day. Sentence6: Their address is unit su43, grande arcade, saint andrews street and their postcode is cb23bj. Sentence7: I need something in the Center of town. Sentence8: Thanks, I am also looking for somewhere to go in the centre area. Sentence9: Their address is 12 St. Johns Street City Centre. Unfortunately their phone number is not available. Sentence10: Yes Ugly Duckling would work. Would you please reserve it for me and send me the reference number? Thank you. Sentence11: Yu garden is in the expensive price range in the east part of town. Sentence12: Castle Galleries is a museum in the centre and it's free. Would you like the address or another option? Sentence13: I am looking for an upscale Chinese food restaurant in Cambridge; can you make a recommendation? Sentence14: That sounds fine. Can you give me the address and phone number? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System