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 would be happy to help you find a great attraction to visit! What kind of attraction are you interested in visiting? Sentence2: You're welcome. Sentence3: Great, thanks! I think that's all I needed. Sentence4: I would like to find a nice attraction to visit in the centre of town. Sentence5: I'll be heading to Cambridge, but I can't leave until sometime after 21:15, please. Sentence6: I have no preference. Can you make a recommendation and provide the address, entrance fee, and postcode? Sentence7: The address is 98 King Street and the postcode is cb11ln. What is your destination on Friday? Sentence8: How about the Broughton House Gallery? There is no entrance fee. Sentence9: I managed to book you on that train. The total fee is 9.8 GBP and the reference number is 9M753T1T . Sentence10: There are two trains meeting your needs. The earlier train leaves at 22:11 and the later train at 23:11. The ride takes 47 minutes. Which do you want me to book? Sentence11: Can you get me one ticket on the 22:11 train? Sentence12: whats its postcode and address? i would also like to get a train that leaves friday from kings lynn Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System