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: Great, thanks for all of your help! You have been wonderful! Sentence2: What is the post code, address, and entree fee? Sentence3: I don't have any Cantonese restaurants in the centre. I could try another cuisine or another area? Sentence4: What other local attractions are there to explore? Sentence5: There is one of those- it is called wagamama. Would you like to make a reservation? Sentence6: Your table is reserved. The reference number is BS73EYWV . Sentence7: The postal code is cb11ln, address is 98 King Street, and the entrance is completely free. Sentence8: You're very welcome! Text us back anytime, and have a wonderful visit in Cambridge! Sentence9: I have booked you a black volvo. The contact number is 07018935922. How else may I assist you today? Sentence10: There are several. Vue Cinema is a popular attraction. Would you like the address? Sentence11: Sure. Book it for 4 people at 11:45 on a saturday. Sentence12: Actually, I'm in the mood for Cantonese food. Are there any like that? Sentence13: Hello! This is my first time to Cambridge, can you recommend a good, expensive restaurant in the centre? Sentence14: That sounds good. I also need to book a taxi to go from the Vue to the restaurant by my booked time. Sentence15: There are 11 found. how about the broughton house gallery? Sentence16: No I would prefer a museum. Sentence17: Do you want British food? If so, the Cambridge Chop House is popular. You are in luck as there is a wide range of options. Sentence18: OK. How about an expensive Japanese restaurant? I'd like to treat myself! Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System