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: That should work as well! Please go ahead and book! Sentence2: The phone number is 01223337766. Can I help you with anything else? Sentence3: There is a train (TR7062) that leaves at 16:40, will that work? Sentence4: May I ask how many tickets you would like for that train? Sentence5: On second thought, I will go ahead and book later. We may need more tickets for some guests we might have coming. Thanks so much. Goodbye. Sentence6: Unfortunately, I haven't found any inexpensive restaurants that serve Scandinavian food. Would you be willing to look for a moderately priced restaurant instead? Sentence7: Actually that one is sold out however TR2001 leaves at 16:40 as well. Travel time is 28 min and price is 8.08 pounds. Sentence8: Thank you for using Cambridge TownInfo centre. Please remember us for all of your future travel needs. Sentence9: There are many trains that are available, could you give me some more information on what you're looking for? Sentence10: Yes I need to go to stansted airport from cambridge on saturday after 15:45. What are my options for this? Sentence11: I have found four different British restaurants in the Centre area with a moderate price range. May I recommend Restaurant One Seven? Sentence12: Yes, that sounds perfect. Can you tell me the price and travel time, or duration, on that one? Sentence13: Is there an inexpensive restaurant which serves Scandinavian food? Sentence14: Unfortunately there are no Scandinavian restaurants in that area. Would you like to try another type of cuisine? Sentence15: I also want to know about taking the train down there. Sentence16: How about british food? Sentence17: yes, that is fine. Please make sure it's in the centre of town. Sentence18: Yes, that sounds good, can I get their phone number? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User