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: Sorry, they don't have those dates available. Would you like me to try for other days or another location? Sentence2: Glad I could help. Have a nice stay. Bye. Sentence3: Sorry, the Acorn is not open then, shall I try somewhere else that fits your criteria? Sentence4: The Acorn Guest House is a 4-star guesthouse in the North. It has free parking and wifi, and is in the moderate price range. Would you like a room? Sentence5: That sounds like what I am looking for. Yes, I'd like to book a room. Sentence6: Good news, The Acorn just opened up for one night. Your reference number is UKMNFD3Q . Can I help you with anything else today? Sentence7: Hi, can you help me find a place to stay? I'd like a hotel on the north side, please. Sentence8: I would like to book a room for 3 days starting Tuesday. There is a total of 3 people. Sentence9: Great! When would you like to stay? Sentence10: Yes, whatever you can find. Sentence11: Thanks, I think that's all I need right now. Bye Sentence12: Can you try for just 1 night then? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User