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: That is all I need, bye. Sentence2: Wait! Before you go, can you tell me about your favorite college to visit in town? Sentence3: What is the address and phone number of Queens' College? Sentence4: What is the price? Sentence5: I need to leave from cambridge and leave after 08:30 Sentence6: No thank you. That's all I need. Sentence7: You're welcome, have a great day! Sentence8: Absolutely. Their postcode is cb39et. Is there anything else I can do for you? Sentence9: Goodbye and enjoy the rest of your day! Sentence10: Yes, one more thing. May I have the postcode for Queens' College, please. Sentence11: Hi there. I would like to find a train to Ely for Thursday. Sentence12: There is Queens' College on the west side of town. Sentence13: The price is 4.40 pounds. Is there anything else you want? Sentence14: I have a train TR1923 leaving cambridge at 9:50 and arriving in ely at 10:07 on thursday. Would you like to reserve this? Sentence15: The address is silver street and the phone number is 01223335511. Is there anything else I can help you with? Sentence16: No problem, what time would you like to arrive in Ely? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User