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: Hi, I'm looking for a guesthouse that's in the expensive range. Sentence2: I am sorry but there are no guesthouses in the expensive price range. Do you want me to check hotels or a different price range for a guesthouse? Sentence3: There are 10 trains that day starting at 05:35 and then every 2 hours. What time do you want to leave and how many tickets would you like to book? Sentence4: Not a problem, the train tickets cost 4.40 pounds each. Can I assist you with anything else, Sentence5: I'd prefer a cheap guesthouse instead (that still offers WiFi). Sentence6: Allenbell looks like a good fit. Would you like me to make a reservation? Sentence7: Ok, would you please give me some information? What day and time are you traveling? Where are you going? Sentence8: A and B guest house looks like it is in the moderate price range with internet, would that work for you? Sentence9: Yes, please. I would like to book a room starting Wednesday for 5 people, 2 nights. Sentence10: TR8610 leaves at 17:35. Can I help you book? If so, how many tickets do you need? Sentence11: I'd like to leave after 16:30, please. Sentence12: You're welcome. Have a nice day. Sentence13: I also am looking for a train. Sentence14: I will be travelling from Ely to Cambridge on Wednesday and need to leave after. Sentence15: And what time does the train arrive? Sentence16: No thank you. That's all I need. Thank you and goodbye! Sentence17: I have booked you into the Allenbell on Wednesday for 2 nights with accommodations for 5 people. Your reference number is AJSQZY8R . Sentence18: I need the place I'd like to stay to also include wifi, is there anything? Sentence19: Thank you, I will not need the booking quite yet but I would like to have the price of the train as well please. Sentence20: It arrives by 17:52. Would you like me to book it? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User