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: Actually, I don't want to book yet. Thanks for the information. I think that is all I need. Sentence2: I was able to book it, the reference number is O6ZSM73S . Sentence3: That is all I need. Goodbye. Sentence4: phone number is 01223365664 and postal code cb41da Sentence5: When would you like to arrive, and how many guests are in your party? Sentence6: The hotel should be in the north. Sentence7: I have 17 locations. Do you have an area of town you'd like to stay in? Sentence8: Thanks. I'm also looking for information on moderately priced hotels with free wifi. Sentence9: OK book that please Sentence10: There are plenty of trains arriving that early. Where are you coming from, and what day are you traveling? Sentence11: how about hamilton lodge? i hear they're great. Sentence12: Ok. Thank you and goodbye. Sentence13: Sounds good. Could you get me the postcode and the phone number? Sentence14: We have four early morning trains available that day, one every hour from 5:24 to 8:24. Would you like to book one? Sentence15: Is it possible to get a morning train that arrives in Cambridge by 9:15 or do you need to get there the night before? Sentence16: Yes, please! The one at 8:24 please. 1 person. Give me the reference number. Sentence17: I'll be coming in from Stansted Airport on Friday. Sentence18: Thank you for using our services. Have we met all of your needs today? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System