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: I'm sorry, we don't have any rooms available there on Thursday. Would you like to try a different hotel? Sentence2: Yes. I need to book for 4 people for 3 nights starting from Thursday. Sentence3: Yes, book it and I need a reference number. It doesn't matter the kind of museum. Sentence4: I apologize. I thought the booking had confirmed but it did not. They are booked full. Would you like to try a shorter stay? Sentence5: Thank you so much for your patience. Have a great day! Sentence6: Yes, that is all that I needed. Thank you for your help! Goodbye. Sentence7: I want it to be a hotel and the stars don't matter. Sentence8: Unfortunately, booking was not available. Could you choose another day or arrange for a shorter stay? Sentence9: No, just let me know what you would recommend and give me the postcode, area, and phone number. Sentence10: Sorry, let me try to get this right. Are you looking for a moderate priced hotel(?) or guesthouse(?), with wifi, in the north? Does star number matter? For 1 night? Sentence11: I was able to find you one night at the avalon hotel? May I book it for you? Sentence12: Yes, please book that for me and give me the reference number. Sentence13: Yeah, let's just try for one night please. Sentence14: Sure, I need a hotel that is moderately priced that is in the north area. Sentence15: Thank you for that, can I have their phone number as well? Sentence16: OK, the Ashley Hotel is a moderately priced hotel in the north with free wifi. Would you like a room there? Sentence17: I like byard art, the postcode is cb21sj and their address is 14 king's parade Sentence18: Book whatever is avaliable, thanks! Sentence19: Can you try just one night? I can use the reference number, too, if successful. Also, are there museums in town? Sentence20: I apologize for the long wait. You are booked at the hamilton lodge. Your reference number is EL2JG964 . Is there anything else I can help with? Sentence21: The Avalon shows availability for 3 nights starting Thursday for 4 people. It is a 4 star moderately priced guesthouse. Would you like me to book it for you? Sentence22: Yeah this seems fine. Go ahead and book it for me. Sentence23: OK, I have you booked at the ashley hotel. There are no Museums in the North, where are you wanting it located? Sentence24: Yes it is in the moderate price range. Shall I book it for you? Sentence25: Of course you can, it's 01223464646. Would that be all for you today? Sentence26: Booking was unsuccessful. Can I try another day or a shorter stay? Sentence27: I apologize, as I went to book it someone else must have already snagged it. Can you stay on a different day maybe? Sentence28: sorry, but Friday is all booked Sentence29: What is the reference number for the Ashley Hotel? Sentence30: All right, then let's start all over again. I need a place to stay for 4 people 3 nights, if not then for one night. Sentence31: Hmm, are you absolutely sure that there's no moderately priced places in the North for 4 people, 1 night on Thursday? Sentence32: Acorn guest house in the north has a 4 star rating and free internet. Would you like me to book a room? Sentence33: There is ashley hotel with all your requirements met. Can I book for you? What kind of museum are you interested in? Sentence34: Yes I would like to visit a museum. Sentence35: Can you book it for 1 night? Sentence36: Could you tell me if Acorn guest house is in the moderate price range? Sentence37: How about starting on Friday? Sentence38: No, but please try 1 night instead of 3. Sentence39: I am sorry but the room in that area on Thursday are booked. Shall I try another day for you? Sentence40: We have many museums in town, in every area except the north. Do you have a preference? Sentence41: Yes, I need it for 4 people for 3 nights starting Thursday. Sentence42: Yes, Unfortunately I double checked all the hotels available for what you are looking for. They are all booked up for the night. Sentence43: I am looking for a hotel with free wifi for when I am visiting Cambridge. Sentence44: I'm sorry, that is not available. Could you possibly shorten your stay? Also, this is a guesthouse, were you looking for a hotel room instead? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User