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, it is 01223307402. Anything else today? Sentence2: Yes, please. Book it for 8 people on saturday 14:30. Sentence3: No, that should be all. Goodbye! Sentence4: Sure how about a booking at 13:30? Sentence5: The nandos city centre serves portuguese. Would you like me to book a table for you? Sentence6: The address is unit su43,grande arcade, saint andrews street Sentence7: Yes, may I have the address and the phone number? Sentence8: No problem. Is there anything else you need? Sentence9: Hello, I am traveling to cambridge and would like to find a place to eat. I want it in the centre of town, in the cheap range. Sentence10: cBooking was unsuccessful. Can we try another day or time slot? Sentence11: I need the contact number and car type for the taxi please. Sentence12: Excellent. Thank you for your help. Sentence13: We have 15 inexpensive places to dine in the center of town. Is there any particular cuisine you'd like? Sentence14: I would like the taxi arrives at the restaurant by 13:30. Also could you provide me with the phone number for Castle Galleries? Sentence15: You are all set for 13:30, the reference number is 0AH6HXGL and the table will be reserved for 15 minutes, anything else that I can assist with? Sentence16: That's great! Can you see if one of them serves portuguese food, please? Sentence17: I think I'm good, thanks! Sentence18: How about castle galleries? It's a museum in the centre of town. Sentence19: Okay, what time would you like to depart or arrive? Sentence20: I will also need to book a taxi for commuting between the restaurant and museum. Sentence21: Thank you for using Cambridge TownInfo centre! Goodbye! Sentence22: You're welcome! Have a good day! Sentence23: Sure. The car is a red volkswagen and the contact number is 07422508366 Sentence24: Yes, I am also looking for places to go in town in the same area as the restaurant. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System