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: enjoy your stay in cambridge! Sentence2: No thanks. I will book later on my own. Thanks for all the help. Goodbye. Sentence3: Would you like to stay in the East part of town, near the gallery? Sentence4: It is located at the belfast yard, coldham's road in the east of the town. Here's the phone number 01223902116 Sentence5: We have one guesthouse in the south. Bridge Guest House on 151 Hills Road. Would you like to reserve a room? Sentence6: Can you let me know the price range of the guesthouse? Sentence7: Certainly! The price range is moderate. Their phone number is 01223247942. Would you like me to book a room for you? Sentence8: No, I'd like a 3 star guesthouse in the south. Sentence9: Actually, a friend was telling me about this great gallery in town. It was called the Saint Barnabas Press Gallery. Can you tell me about it? Sentence10: I am excited to see some local attractions. Can you help me with a particular one? Sentence11: Sure. Were you looking for a particular area of town to visit? Sentence12: I am also looking for a place to stay at. Any recommendations? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System