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: Your total is 17.89 GBP. You can pay that at the station. Your reference number is RAIYCNJU . Sentence2: I need a train after 21:15. Sentence3: Ok great. What day will you be traveling? Sentence4: No, I have no preference. Just pick one. That will be fine. Sentence5: could you provide details for something in the cheap price range? Sentence6: I hope you not going to sit in your room by yourself for 5 days, are you sure that you dont want to know about a restaurant or attraction? Sentence7: thank you for using this service good bye Sentence8: I have the TR9688, which leaves at 12:32. Would you like to book this train? Sentence9: that is all i needed for today. thanks alot Sentence10: Perfect. I'll need a room for myself, for five nights on tuesday. Sentence11: I need tickets for one person. Sentence12: Actaully i will be on business so not out much but I do need a train, to cambridge leaving after 21:15 Sentence13: Great, thanks for that information on the train. Can you book for a train leaving after 21:15? Sentence14: How many tickets do you need? Sentence15: Yes, I need a train going to cambridge leaving after 21:15 on tuesday departing from broxbourne. Sentence16: The TR3112 arrives at 22:32. Sentence17: There are 33 cheap hotels with wifi in Cambridge. Do you have a particular area you are interested in? Sentence18: There are 3 trains leaving an hour apart starting at 21:32. The travel time is 60 minutes and costs 17.90 pounds. Would you like me to book one? Sentence19: I need a place to stay that has free wifi. Sentence20: Nope, that's it. Thanks! Sentence21: I have 32 places that offer wifi, do you have a price range preference? Sentence22: Perfect, you are all set for Alexander Bed and Breakfast on Tuesday, your reference number is 22DG5770 . Is there anything I can help with today? Sentence23: I recommend alexander bed and breakfast on 56 saint barnabas road would that due? Sentence24: No thank you. I just need the train ID and arrival time for one of them. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System