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: I was able to successfully book for 1 night. Your reference number is GS8AHUYB . Is there anything else I can help you with? Sentence2: How about 1 night? Sentence3: I am also looking for a restaurant in the same area that serves Italian food. Sentence4: No, that's everything. Thanks! Sentence5: I am looking for one in the expensive price range. Sentence6: I'm looking for a hotel in the south, I don't need a free parking option. Sentence7: Sure, do you need a hotel room or would you like a guesthouse? Sentence8: I hope that you have a great day as well! Sentence9: Thank you, if you need anything else just ask. Sentence10: I am sorry, I could not get that booked for you maybe another day or a shorter stay perhaps? Sentence11: OK, can I get theie phone number and postal code? Sentence12: Are you looking for a particular price range? Sentence13: We have the Lensfield hotel in the south that is in the expensive price range. Would you like a reservation there? Sentence14: The phone number is 01223323737 and the postcode is cb17dy. Can I help you with anything else? Sentence15: It doesn't really matter to me. Sentence16: The pizza hut cherry hinton features italian food and is located in the south. Sentence17: You are welcome, have a great day! Sentence18: Sure, I need 3 nights arriving on Saturday. There are 7 of us. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System