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: Of course! Your confirmation number is : NA5IKOHZ . Can I assist you with anything else today? Sentence2: Okay, sorry about the wait. I have booked 8 tickets for train TR7324. It will leave 21:40 and costs 600.79 GBP. The reference number is 2I340EJN . Sentence3: Thank you so much! Sentence4: Great, thanks so much Sentence5: Okay, let me work on booking that and I will be back with you shortly. Sentence6: Yes please. And I need the reference number please. Sentence7: Yes please, 8 people for 5 nights starting thursday, and can I get the reference number? Sentence8: How many tickets will you need? Sentence9: Can you help me find a place to stay maybe a expensive guesthouse? Sentence10: Have a great day. Goodbye. Sentence11: I have no expensive guesthouse's. Would you like to try a hotel or a different price range? Sentence12: Well, I preferred a guesthouse but since there are none, can you see if there are any hotels with my other specifications staying the same? Sentence13: That's great! I need a train. It should leave after 20:45 from Birmingham New Street. Sentence14: I have three trains. Do you need to book some tickets? Sentence15: what day, monday or friday please? And how many tickets? And are you going to Cambridge? Sentence16: I will need eight tickets please. Sentence17: I am showing nothing matching your request. Did you want to try another search? Sentence18: I was really wanting a guesthouse in the east with an expensive price range and include free parking. Sentence19: Yes, I'm going to Cambridge and I need to leave on Thursday. Sentence20: express by holiday inn cambridge fits that description. can i book for you? Sentence21: rad that's all i need now Sentence22: I will work on booking this for you and be back with you shortly. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System