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: No, that is all I need. Thank you for your help! Sentence2: I am looking for a vegetarian restaurant near South Cambridge, or a restaurant that has a variety of vegetarian dishes. Sentence3: What is the area that is in? Sentence4: Free parking isn't that expensive to me, are there any others or just the University Arms? Sentence5: You are welcome! Have a wonderful day! Goodbye! Sentence6: How many nights will you be staying? Sentence7: Please book the Marriott for 4 please. Sentence8: I'm sorry, I'm experiencing a system error. Could you please restate your request? Sentence9: Yes, I also need a place to stay I need a hotel that is expensive. Sentence10: I have 5 hotels in total to choose from. We have a Marriott in the expensive price range in Cambridge if you are interested. Sentence11: University arms hotel is also in the centre area in the expensive price range. Free parking and internet. Would you like to book a room? Sentence12: Sure, its on 2 Norfold Street. Anything else? Sentence13: It is in the centre of the city. Can I help you with anything else? Sentence14: Does it have internet? Sentence15: Yes, the Huntingdon Marriott has internet, would you like more information on this hotel? Sentence16: Uh, can you tell me where the Man on the Moon exhibit is? Sentence17: the huntingdon Marriott is a 4 star hotel on the west side. It is in Hinchinbrook business park and the phone number is 01480446000. Can I help with anything else? Sentence18: I'm not sure yet. I actually just need the info. Sorry. Sentence19: Is it in the centre? If it is, I would like to book it. Sentence20: No it is in the west. Do you wanna book it? Would you like to try university arms hotel instead, that is also in the centre. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System