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 can't wait to try it. I'm not ready to make a reservation yet. Thanks for your help. I'll call back. Goodbye. Sentence2: I am terribly sorry there aren't any, another type perhaps? Sentence3: I have train TR1575 that leaves at 15:09 and arrives in Cambridge at 16:54. Would that work for you? Sentence4: I need information about a train. Sentence5: Yes there are 4 results. How about hotel du vin and bistro? Sentence6: How about european food then? Sentence7: That one is a moderately priced restaurant. It's fantastic! Sentence8: Okay! Where would you like to go? Sentence9: Thanks, I need to find a danish restaurant in the centre of town Sentence10: I have booked you for 3 people on TR1575. Your reference number is Y4IU29UM . Can I do anything else for you? Sentence11: I need a train on thursday that'll arrive by 18:00, traveling from leicester to cambridge. Sentence12: Yes, can you please book me for 3 people and get me a reference number? Sentence13: What is the price range for hotel du vin and bistro? Sentence14: Thank you, we'll be happy to help when you're ready to make a reservation. Have a great day! Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User