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: rosa's bed and breakfast Sentence2: Is it a type of guesthouse and is it in the south? Sentence3: yes I found it and it was great Sentence4: You're welcome. Have a good day. Sentence5: Thank you for the reference number, how about the sri lankan restaurant in the south? Any luck finding one? Sentence6: That sounds good. Can you book it for 3 people to stay 5 nights on tuesday? Sentence7: Nah, I'd like to stay in the same area as the hotel. Let's try a Portuguese restaurant instead. Sentence8: I apologize but there are no Sri Lankan restaurants in south Cambridge. Would like to explore another area? Sentence9: Can I also get a taxi from the hotel to the restaurant? I'd like to leave the hotel by 5:30, please. Sentence10: Rosa's bed and breakfast on 53 roseford road is inexpensive and has a 4 star rating. Would you like me to make a reservation for you? Sentence11: The reference number is 7AAVA5YO Sentence12: Yes, sir, we have the booking all completed for you. That was Five days starting Tuesday, for three people. Is that correct? Sentence13: Yes I got you a taxi. It is a grey Volkswagen whose contact number is 07956461934. Sentence14: Hi, I'm planning a visit to the south of Cambridge and am looking for a bed and breakfast. Sentence15: Absolutely. The postcode is cb17dy, the address is at Cambridge Leisure Park in Clifton Way, and the phone number is 01223327908. Sentence16: Sounds great. Thanks for your help. Sentence17: No but could I get the postcode, address and phone number please? Sentence18: You're in luck. We do indeed have a Portuguese restaurant in that area. The name is Nandos. Would you like a reservation? Sentence19: Yes, but I do need the reference number, please. I'm also looking for a sri lankan restaurant in the south. Sentence20: I'm sorry there are no results for a sri lankan restaurant in the south. Would you like to change some criteria, such as area or cuisine? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User