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 would also like to find out if there are any museums located in the centre of town. Sentence2: Sure the phone number and address for Castle Galleries are 01223307402 and unit su43, grande arcade, saint andrews street. Sentence3: The closest train meeting you requirements will arrive in Stansted at 17:08. Would you like me to book that for you? Sentence4: We have many trains going to Cambridge, Where are you departing from? Sentence5: May I have the phone number and address for Castle Galleries? Sentence6: The train departs at 17:40 duration 28 minutes price 10.10 pounds. Sentence7: I'm happy to be of service. Enjoy your stay in Cambridge! Sentence8: That works. May I get the departure time, travel time, and price for that as well? Sentence9: No, no fee it is free entrance. Is there anything else I can help you with? Sentence10: No, thank you, that is all. Sentence11: I show 11 results for museums in the centre, all free entrance. To name a few there is castle galleries, primavera, ruskin gallery. Would you like more information? Sentence12: Is there an entrance fee? Sentence13: I need a train to Cambridge that will arrive by 18:03 and leaving on Friday. Sentence14: Depart from Cambridge and go to Stansted Airport Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System