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'm so sorry but we don't have any expensive cantonese. Would you like to try another type of food? Sentence2: All set. Your reservation for one is confirmed for Wednesday at 19:30. Your reference is HB2TWWH0 . Is there anything else I can do for you today? Sentence3: enjoy your stay! Sentence4: I got you booked for the Acorn Guest House for 1 person for 2 nights starting on Wednesday. Your booking number is 2NFSNMZP . Is there anything else I may assist you with? Sentence5: The guesthouse has free wifi and parking Sentence6: I booked the Acorn Guest House in the north, the address: 154 Chesterton road. How many days are you going to stay? Sentence7: I would suggest Fitzbillies Restaurant. Would you like me to book a table now? Sentence8: That would be perfect. Sentence9: Can I just confirm it has free internet as well Sentence10: What does Cambridge offer as far as expensive cantonese restaurants? Sentence11: No, but I want the most expensive one. Sentence12: There are 6 British restaurants. Do you have a particular area of interest? Sentence13: I'll be dining alone so please make a reservation for 1 at 19:30 or 18:30, perfer 19:30 on wednesday. Reference number please? Sentence14: How about british food instead. Sentence15: how about acorn guest house? i hear it's lovely Sentence16: I will be staying 2 days. Sentence17: I'm also looking for a hotel with free parking. It will be for just one person, like the restaurant booking. Sentence18: Great, that will be all thank you. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System