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: Thank you for all your help. Sentence2: I will be visiting family in the south part of cambridge and we would liek to get one last boating excursion in. Any boating places in the south area? Sentence3: No problem. Are you sure you don't want to go ahead and make a reservation? Sentence4: No, I'm sorry there are no 1 start guesthouses offering free wifi. Is there anything else I can help you with? Sentence5: i would like place to stay. The hotel should be in the type of guesthouse and should include free wifi Sentence6: aylesbray lodge guest house is a nice four star guesthose with internet available. Would you like me to book you a room? Sentence7: It looks like there isn't any boating in the south area. Would you like me to look in a different area of town? Sentence8: Is there anything else I can help you with? Sentence9: Can you book it for 4 people for 2 nights starting friday? Sentence10: How about a nightclub in the south? Sentence11: Okay, the four will be fine, then. I don't need to book, yet. Thanks for your help. Sentence12: I would prefer a guest house that has one star. Is there one available also with free wifi? Sentence13: Sure, The Place is on 22 sidney street and the postcode is cb23hg. Phone number is 01223324600. Sentence14: Okay. I have a reservation for 4 for two nights starting Friday. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User