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: Happy to be of service. Have a wonderful day! Sentence2: Ok. I was able to book for 4 nights. Your reference is DTUFTTJP . Can I help with anything else? Sentence3: Yes, for 5 nights beginning Wednesday for 1 guest please. Sentence4: I am also looking for information about a restaurant called Zizzi Cambridge. Sentence5: Can you please repeat the phone number and provide the address. Thank you. Sentence6: The Autumn House is located at 710 Newmarket Road. Would you like for me to book this for you? Sentence7: I was unable to book, could you please choose another day or pick a shorter stay. Sentence8: Hello, I am looking for a certain hotel in Cambridge called the autumn house. Sentence9: No, I think that's all I need right now. Thanks very much for your help! Sentence10: How about 4 nights instead of 5? Sentence11: Zizzi Cambridge serves Italian food and is cheap. The phone number is 01223365599, or should I book a table for you? Sentence12: The phone number is 01223365599 and zizzi cambridge is located at 47-53 Regent Street postcode cb21ab. Can I help you with anything else? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User