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: Thanks so so much! That's all now, bye! Sentence2: Yes. Can you please book a table for one at 12:45 on Friday? Sentence3: Yes please. I need it to be for 1 person for 2 nights starting on Friday. Sentence4: I have completed that booking. The reference number is A2Q5X07S . Can I do anything else today? Sentence5: Can you give me information on hotels in the centre? Sentence6: Your reservation at university arms hotel this friday for 3 days 2 nights for 1 person was successful. Your Reference number is : ZUWP7UJK . Sentence7: You are very welcome! Take care! Sentence8: Not interested in the price, but I would like it to be a 4-star hotel. Sentence9: Great, can you also find me a Japanese food restaurant in the expensive price range? Sentence10: I'm sorry. I needed a hotel, not a guesthouse. Sentence11: What price range are you looking for? Sentence12: The University Arms Hotel meets your criteria. Would you like to make a booking or more information? Sentence13: We have two. I recommend the alexander bed and breakfast guesthouse. Sentence14: Wagamana is good fit. Would you like me to make a reservation for you? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User