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: Yes please try that. Sentence2: Thank you for all your help. Sentence3: There is the Lensfield hotel which is 3 stars. Would you like me to make a reservation there? Sentence4: I'd like to book the Lensfield Hotel for 2 nights for 8 people starting from Wednesday. Sentence5: That would be great. Thank you. Sentence6: No thank you. I am looking for a hotel instead of a guesthouse. Sentence7: The gonville hotel is expensive and in the center of town. The lensfield hotel is also expensive, but it is in the south. Sentence8: You are welcome. Can I do anything else for you today? Sentence9: I need a three-star place to stay please. Sentence10: No that is all thank you very much. Sentence11: Yes. I'd like one in the same price range, please. Sentence12: I am sorry. I was unable to book that for you. Would you like me to try another hotel? Sentence13: Okay great. I was able to book the Gonville Hotel and your reference number is KWEQK0K1 . Sentence14: The hamilton lodge is a guesthouse in the north with a star rating of 3. Would you like to make a booking? Sentence15: No problem! Happy to help! Have a great day! Sentence16: I was not able to get you into the Lensfield but I can book you into the Gonville Hotel if you like. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User