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 am interested in a guesthouse in the north that includes free wifi please. Sentence2: Thanks. I need to grab a train ticket to Stevenage on Friday, also. Sentence3: I need to leave sometime after 14:45 from Cambridge. Sentence4: The Acorn Guesthouse is a moderately priced guesthouse in the north, and it includes free WiFi. Would you like to book it? Sentence5: Alright, hope your train ride goes smooth! Sentence6: I was able to book the room for you. The reference number is 3UQIM80C . Can I help you with anything else? Sentence7: That guesthouse actually is not located in the north. However, I can offer you ten different guesthouses all that have free internet access. Sentence8: How about moderately priced? Sentence9: That won't be any trouble. What time do you intend to travel, and how many tickets do you need? Sentence10: Hi I am looking for a guesthouse to stay at that includes free wifi. Sentence11: We have 10 guesthouses that meet your needs. Which price range do you prefer? Sentence12: You can find a and b guest house on 124 tension road for a moderate price and it includes wifi. Sentence13: The ticket price for the departure at 15:21 is 12.80 pounds. How else may I assist you? Sentence14: TR8135 departs Cambridge for Stevenage on Friday at 15:21. Sentence15: That sounds perfect. Can I get the price for the tickets? Sentence16: Sure. I'm traveling alone this time. Book me for 2 nights, beginning Wednesday. Sentence17: Is that hotel in the North? Sentence18: That will be all. Thank you! Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User