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. Get me a table for 2 on Tuesday at 13:45 Sentence2: Midsummer House is an expensive restaurant in the centre that serves British food. Would you like me to make a reservation for you? Sentence3: What else can I do for you? Sentence4: I think I got everything I need. Have a nice day! Sentence5: Yes. I was told about a restaurant called the midsummer house. Can you help me find that? Sentence6: Thank you for contacting us and have a nice day. Sentence7: Yes, please provide the phone number. Sentence8: It is free to visit and is located on Saint Andrew's Street, postcode cb23bu. Would you like the phone number? Sentence9: Great I also need a taxi between the two locations that will get to the restaurant at 13:45 Sentence10: Yes, that would be a good choice. Can you give the entrance fee and postcode for that location? Thanks Sentence11: There are eighteen college in cambrdige, any area preference? Sentence12: Yes I was able to book this for you and your reference number is YBD13ZLT . Sentence13: I have booked your taxi. Be expecting a white Toyota. Their phone number is 07740192551. Sentence14: The phone number is 01223334900. Can I be of further assistance today? Sentence15: I don't have any preference as long as it's in town. Sentence16: Cool thanks so much! Sentence17: May I suggest Christ's College in the centre? Sentence18: I want to visit a college in Cambridge. Can you help me find some? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System