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 am looking for a restaurant in the centre area in the cheap price range Sentence2: The address is regent street city centre. Where will you be departing from? Sentence3: How about Charlie Chan? It's a Chinese restaurant that is located in the centre and is cheap. Sentence4: Where are you heading? The cost for trains varies based on the station you go to. I know you're leaving from Cambridge, but to where? Sentence5: I have train TR7409 leaving Cambridge at 09:00, will that do? How many tickets would you like? Sentence6: I don't care, just as long as it's cheap and in the center of town. Sentence7: thanks! that's all i needed to know Sentence8: I just need the price of that train. Sentence9: No, that is all I need today. Thank you for your help! Sentence10: leave after 18:15 and should depart from cambridge on monday,can you book it for me Sentence11: Glad to be able to help! Is there any other information or reservations that you are needing? Sentence12: Thank you for contacting the Cambridge TownInfo centre. Goodbye Sentence13: My destination is stevenage. Sentence14: What is the address? Is there a train I can take to get there? Sentence15: There are 15 restaurants that fit your request. Do you know what type of food you will want to eat? Sentence16: TR8290 leaves Cambridge at 9:21 and gets to Stevenage at 10:10. The cost is 12.80 GBP. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System