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 will take the one in Centre, can you book that for 8 people starting Friday for 5 nights? I need the reference number as well please. Sentence2: I have booked the El Shaddai for 8 people for 5 nights starting on Friday. The reference number is BX3X2XZ1 . Sentence3: I am going to be visiting and would like a guesthouse. Sentence4: I have about 24 different options. Let's try to narrow it down. Do you have a preference on price range or area? Sentence5: I'll be leaving Cambridge on Wednesday and need to arrive by 13:15, please. Sentence6: Have a great trip. Goodbye. Sentence7: I don't have any hotels that match that criteria. Would you like to switch up your rating or price range? Sentence8: Certainly. TR2625 leaves at 11:46 and arrives at 12:55. Will that do? Sentence9: To narrow down the search, could I possibly have the date and the departure location for the train and possibly a desired time? Sentence10: Next up I'd like to inquire about a train going to norwich. Sentence11: Yes. What is the travel time, price, and departure time? Sentence12: it should have star of 0 and should be in the expensive range. Sentence13: ok, I have one in the north or in the centre. Which would you prefer? Sentence14: The price for you trip to Norwich is 17.60 pounds. Do you have any final question? Sentence15: The departure time will be at 11:46 with a travel time of 1 hour 10 minutes. The price is in the cheap range. Sentence16: Sure, I could stay at a cheap guesthouse. Sentence17: That should be all. thank you very much. Sentence18: No thank you very much. Good bye. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User