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: How about TR5570 that leaves at 05:32? Sentence2: no thanks for your service i enjoyed Sentence3: Is there anything else I can help you with today? Sentence4: Where are you headed? Sentence5: How about the TR0788 train that leaves at 05:32? Sentence6: Yes, and I'll just need the train id and departure time. Sentence7: I can't imagine why I asked you to book passage. I always buy my own tickets. In any case, thanks ever so much. Sentence8: Booking was successful, the total fee is 35.79 GBP payable at the station . Reference number is : G2JZA2ZE . Sentence9: I will be leaving on Wednesday. Sentence10: Does that train arrive in Cambridge before 17:15? Sentence11: I am heading to Cambridge. Sentence12: I'm looking for a train departing from broxbourne. Sentence13: I will need to arrive by 17:15. Sentence14: TR0788 arrives in cambridge by 06:32. Would you like me to find something closer to arriving at 17:15? Sentence15: What day will you be travelling? Sentence16: Have a great day. Sentence17: Okay. Would you please book 2 tickets for that one? Sentence18: TR5972 leaves Broxbourne Wednesday at 15:32 and arrives in Cambridge at 16:32, The fare is 17 pounds 90. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User