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: Ok, you have a table for 4 on thursday at 17:45. Reference number is : G684TD29 . Can I help with anything else? Sentence2: In what area of town? Sentence3: It's been a pleasure to help you. Sentence4: i have 2 choices for you. anatolia is one and the other is efes restaurant. which do you prefer? Sentence5: I'd also like to try a Turkish restaurant. Is that possible? Sentence6: I don't mind changing the area. I just need moderate pricing and want something that serves Turkish food. Sentence7: Lets try anatolia. Sentence8: I'm sorry but the only restaurants in that part of town serve either Asian food or African food. Sentence9: yeah, i need something to eat. i'm starving. Sentence10: Ok great and when would you like a table booked? Sentence11: No that will be all. Thank you for your help! Goodbye Sentence12: For 4 people at 17:45 on friday please. Sentence13: I'd recommend allenbell on 517a coldham lane. Would you like me to book a room? Sentence14: Could you give me their phone number? I would like to verify that they have free parking. Sentence15: I'm sorry, we do not have any Australian restaurants in the moderate price range. Would you like to choose an alternate food type? Sentence16: Doesn't matter too much. I'd like a 4 star property, though, and would prefer one of the guesthouses. Sentence17: I'm looking for australian food in the moderate price range, any area is fine. Sentence18: I have 6 guesthouses and 1 hotel on the east side. What's your price range? Sentence19: Allenbell does have parking and the phone is 01223210353. Can I help with anything else? Sentence20: I want a place to stay in the east. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System