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: How about the castle galleries? Sentence2: Sure I would like that, it'll be fore 2 people at 18:00 on tuesday. Sentence3: I want to find information on a restaurant called Wagamama. Sentence4: No, that will be all. Thank you! Sentence5: The address for Castle Galleries is unit su43, grande arcade, saint andrews street. Is there any other information you need? Sentence6: I was able to book at table for 2 on Tuesday at 18:00. Your Reference number is : ZZAA5FY2 . Can I assist you with anything else? Sentence7: Oh good choice. Wagamama is an expensive japanese restaurant that is located in the centre area. Would you like me to reserve you a table? Sentence8: Yes I also want to find a mutliple sports attraction in the town centre. Sentence9: Yes, that sounds great. Can you give me the address please. Sentence10: How about a museum? Sentence11: Your welcome. Have a great day! Sentence12: I'm sorry. We don't have any results. Would you like to try a different attraction type or area? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System