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: No, that is it. Thank you. Sentence2: What is the price range for the hotel? Sentence3: I am looking for a north indian food restaurant in the town centre. Sentence4: Unfortunately there are no expensive North Indian restaurants. Sentence5: Finches Bed and Breakfast is a cheap 4-star guesthouse on the west side. Its postcode is cb30nd. Can I help you with anything else today? Sentence6: I'm sorry, there are no North Indian restaurants in the centre area. Would you like to check a different area? Sentence7: Have we fulfilled all of your requests today? Sentence8: Thank you. Can you give me a reference number? Also, I need to book a 4 star guesthouse. Sentence9: How does the Curry Garden sound? Sentence10: Your reference number is FNEQ6E1A . And alright, any other preferences regarding the guesthouse? Sentence11: I need it to include free wifi. Sentence12: There are 18 guesthouses matching your criteria. What area and price range would you prefer? Sentence13: That sounds good. Please book for 2 people at 11:45 on Saturday. Sentence14: Thanks, booking has been completed. Sentence15: You're very welcome, enjoy your visit! Sentence16: Finches Bed and Breakfast is a cheap guesthouse. Do you need anything more? Sentence17: I trust your opinion, just please let me know the price range and postcode. Sentence18: What about expensive restaurants? Sentence19: What about a restaurant that serves just indian food? Sentence20: No thank you. You have been very helpful. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User