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: Yes I will also need to book a taxi from Rosa's for 04:45. Sentence2: Rosa's Bed and Breakfast is a guesthouse. It has internet and parking, as requested, and the postcode is cb22ha. Shall I book a room for you at Rosa's? Sentence3: Just to confirm, you want a taxi from Rosa's to Christ's College with a departure time of 04:45, correct? Sentence4: Thank you! I would like it to have at least 4 stars. Sentence5: You know what, come to think of it I think I would prefer to stay on the south side of town. Can you check for a 4-star hotel there? Sentence6: I have no preference for the area, would you recommend one for me? I would also need the postcode and entrance fee please. Sentence7: Doesn't matter. Do both include wifi? Sentence8: Thank you. I think that's all I need today. Bye. Sentence9: Could you get me the postcode for Rosa's B&B? And is that a hotel or guesthouse? Sentence10: Christ's college is located in the centre of town at listed postcode cb23bu. The entrance fee is free. Would you like more information? Sentence11: I have two, would you prefer a guesthouse or hotel? Sentence12: no nothing specific, but the cheaper the better Sentence13: There are 18 colleges that you can visit. Is there a particular part of town that you are interested in? Sentence14: No thanks, but I do need a place to stay. Could you find me something with free parking? Sentence15: There are two 4-star hotels: Aylesbray Lodge Guest House and Rosa's Bed and Breakfast. Sentence16: Is there an area of town you'd prefer? Sentence17: I am wanting to visit a college while I am traveling in town. Do you have any listings? Sentence18: Okay you have a booked car, a blue tesla, contact number 07113187062. Sentence19: You are most welcome. Have a good day. Sentence20: There are five places with parking, is there a specific price range you would like to look for? Sentence21: Any other requests? Sentence22: That is correct. Sentence23: I would prefer to stay in the West side of town. Sentence24: Yes both have wifi Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System