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: For Vietnamese, I have a great place called Thanh Binh. It is a cheap restaurant with great food. Would you like help reserving a table? Sentence2: There are no Austrian restaurants in the west. Would you like to try another cuisine? Sentence3: Thank you. I would also like a train leaving on Friday going to Ely. Sentence4: I would like to dine at a cheap restaurant on the west side of town. What are my choices? Sentence5: Great. your booking was successful and you table is reserved for 15 minutes. The reference number is : 99A7DNB0 . Sentence6: I think that covers everything. Thanks for your assistance today, you've been so helpful! Sentence7: I need to arrive by 18:45 on Friday. Sentence8: Would you like me to book it for you ? Sentence9: Okay, I have booked that for you and the reference number is: UDP5WC1J . Can I help you with anything else? Sentence10: TR9933 departs Cambridge at 17:50 and arrives in Ely at 18:07. Do you want me to book this for you? Sentence11: I want to leave in time enough to get to the restaurant on time Sentence12: Yes please, for seven people Sentence13: Would you like to eat Italian or Vietnamese cuisine? Sentence14: Yes, that would be great. My party will consist of 7 people and I would like to book for 12:45 on Thursday. Sentence15: How about Vietnamese food? Sentence16: Thank you! If you need anything else, please don't hesitate to ask. Sentence17: What time would you like to leave? Sentence18: I would like Austrian actually. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User