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: How about Tang Chinese? They are an expensive Chinese restaurant at Napier Street City Centre. Would you like me to make a reservation? Sentence2: No, I don't need a reservation. Just the phone number and post code please. Sentence3: Okay, there are a lots of options. What type of food would you like to eat? Sentence4: You're welcome. Enjoy your meal. Thank you for contacting the centre. Goodbye. Sentence5: I'm trying to find an expensive restaurant in the centre of town. Sentence6: I don't have any restaurants that meet that criteria. Is there another type of food or area you would be interested in? Sentence7: Belgian food please Sentence8: Ok, how about Chinese food then? Sentence9: You are quite welcome. Is there anything further I can assist you with? Sentence10: Great! Thanks so much. Sentence11: their phone number is 01223357187. and port code is cb11hr Sentence12: No that is all. Thanks Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System