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: You're welcome, have a great day! Sentence2: Could we try 2 nights. Sentence3: I don't need tickets right now, but can you tell me the train ID for the 22:58 train, please? Sentence4: I'm sorry, but I was not able to book it. Would you like to try another day or, perhaps, a shorter stay? Sentence5: I am looking for a guesthouse to stay in when I visit next month. Sentence6: Could I book it for 1 person for 3 nights starting Tuesday? Sentence7: Oh sorry I still want to look for a train from Cambridge to Kings Lynn which leaves at 21:15 Thursday. Sentence8: Alright I've found quite a few. How about the acorn guest house? Sentence9: The train is TR3495. Will that be all today? Sentence10: I would recommend Bridge Guest House. It is in the south and has 3 stars with free wifi and parking. Sentence11: That was a success! Your reference number is G8JEZPDW . Is there anything else I can help you with? Sentence12: Does it have 3 stars? I'd like my lodgings to be 3-star rated, please. I'm quite particular. I also will require free parking and Internet. Sentence13: I have two, arrivals of 22:58 and 23:68. Shall I book them? Sentence14: No, that is all, thank you again. Sentence15: You're very welcome. Goodbye! Sentence16: No,that is all thanks. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User