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 would like to book this. There are 5 people that will be staying for 4 nights starting Saturday. Can I get a reference number? Sentence2: I would like to take a train to leave cambridge. Sentence3: I need a guesthouse that has free wifi Sentence4: Thank you very much. That is all. Sentence5: TR0797 leaves cambridge at 19:34 and arrives in peterborough at 20:24. Would you like to book tickets for this train? Sentence6: There are 12. Is there a star rating you would like? Sentence7: The TR3347 meets your current criteria, but you have a lot of options. Would you like to narrow it down further by departure time or arrival time? Sentence8: Your hotel has been booked. Your reference number is ZNMV4ENM . Can I be of further assistance? Sentence9: Your booking was successful. The total for 5 people is 82.5 GBP and your reference number is 4G3J82OG . Is there anything else I can help with? Sentence10: Yes please. I need tickets for 5 people and a reference number. Sentence11: Honestly, I always stay at the same place when we travel there, so I could really use a recommendation. Any one will do just with wifi and moderate pricing. Sentence12: There are lots of options. What area would you like to stay in? Sentence13: I need to arrive by 20:30. Sentence14: I would recommend the Kirkwood House. It is located in the north. It has 4 stars and free parking and wifi. They are located at 172 Chesterton Road. Sentence15: You're welcome, I was glad I could help. Don't hesitate to contact us if you think of anything else you need. Sentence16: I have 1,414 trains that are departing Cambridge this week. What day will you be traveling on? Sentence17: I'm not picky. Where would you recommend that is in the moderate price range? I'll need free parking, too. Sentence18: I'm going to peterborough on wednesday Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User