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: what is your price range to narrow down our choices? Sentence2: You're very welcome! Bye now! Sentence3: Nothern European food, please Sentence4: You have come to the right place! What kind of food do you like? Sentence5: Ok. How about just european? Any luck there? Sentence6: No, thank you for your help today Sentence7: The reference number is NMEZYUQT . Can I help you with anything else? Sentence8: I will need two tickets. Sentence9: Yes please reserve a spot and give me the reference number after. Sentence10: What is the booking reference number? Sentence11: I recommend TR3343. It leaves Cambridge at 07:00 and arrives in London Kings Cross by 7:51. Will that work for you? I can reserve a spot? Sentence12: I am planning a trip in Cambridge, Looking for a place to dine Sentence13: I have five restaurants that offer european foods, 3 at the center, 1 on west and that other one on the north. Which are do you prefer? Sentence14: How many tickets will you need? Sentence15: I have booked you 2 tickets. Sentence16: Whichever you recommend. Can I have the phone number, postcode, and address, please? Sentence17: I would like to find a expensive one please. Sentence18: I was unable to find any northern european restaurants Sentence19: Okay. I;m looking for a train that departs from cambridge on tuesday and arrives by 08:00 in london kings cross. Sentence20: I recommend the Eraina. The address is on Free School Lane City Centre, cb23rh. The phone number is 01223368786 Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System