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: It departs at 15:17, and is a 51-minute ride. Can I help you with anything else? Sentence2: What's the travel time on that train? Sentence3: Thanks! I also need a train arriving at 17:15 on Monday. Sentence4: What time does it depart? Sentence5: That will be all. Thank you. Sentence6: No, that is all for now. Thanks. Sentence7: I'm departing from Longon Kings Cross. Sentence8: No. I just need to know the departure time and how long it takes. Sentence9: Can you recommend a Polish restaurant instead? Sentence10: Unfortunately, we no longer have any Polish restaurants in town. The only one we had closed last month. Can I find something else for you? Sentence11: The travel time is 51 minutes. Sentence12: Where you be departing from? Sentence13: How about one with gastropub food? Sentence14: Sure. I don't have their telephone number but their address is 34 - 35 Green Street. Sentence15: There are two options - the backstreet bistro and the slug and lettuce. Do either of those sound good to you? Sentence16: Yes can you give me the address and phone number of the slug and lettuce? Sentence17: The train departs from london kings cross at 15:17. Do you want me to book the train for you? Sentence18: There is a train that arrives at 16:08. Would you like to book it? Sentence19: 51 minutes is the length of the ride, anything else today? Sentence20: You're welcome, have a great day. Sentence21: well then may I suggest kymmoy, they serve asian oriental and that's where I go to dine Sentence22: Where in the centre can I dine? I want something expensive. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System