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: For what day would you like me to try booking for? Sentence2: Train TR7656 departs Cambridge on Tuesday at 09:01. If this works for you how many tickets do you need booked? Sentence3: Awesome. Take care! Sentence4: I have booked 6 tickets for train TR7656 leaving at 9:01 Tuesday. The total fee is 107.4 GBP payable at the station and the reference number is SGNRTY27 . Is there anything else I can help you with? Sentence5: There are no moderately priced hotels in that side of town. Would you like to try a different side of town? Sentence6: That is all, thank you. Sentence7: I definitely want to stay in a hotel, not a guesthouse. Is the hotel moderately priced, and does it have free parking? Sentence8: I see, well how about a guesthouse in that area with free parking? Sentence9: Unfortunately, neither guesthouse can accommodate 2 nights. Is there another date you'd like to try for, or would you like to try for 1 night rather than 2? Sentence10: There are 3 guesthouses and 1 hotel in the south of town. Is there a particular price range you're looking for? Sentence11: I have booked 6 into Acorn Guest House for 2 days starting Sunday. It is moderately priced, in the north, with parking. Reference number 0GNWIGNC . Is there anything else? Sentence12: Let's try again. A moderately priced guesthouse in the south with free parking. Sunday, 2 nights, 6 people. Sentence13: OK, can you accommodate 2 nights then? Sentence14: Could you check another area of town perhaps that can accommodate 6 guests for 3 nights starting Sunday with a moderate price and free parking? Sentence15: I'm sorry, as I previously mentioned neither guesthouse can accommodate that request. How about another area of town? Sentence16: Yes, which one has room for six guests? Sentence17: Yes I have two guesthouses in that area. Would you be interested in either of them? Sentence18: I need a train from cambridge to broxbourne that leaves after 8:15 on tuesday. Sentence19: Unfortunately those are the only options within that price range. Would you like me to look for a more affordable option? Sentence20: Unfortunately, neither of those guesthouses can take in 6 guests for three nights on Sunday. Might I suggest another day or a shorter stay? Sentence21: I need it on Sunday, for 3 nights. Sentence22: I'm looking for a place to stay in the south of town. Sentence23: Not based on Sunday arrival - would you like to try another day or shorter stay? Sentence24: Just please book for that room for 2 nights. Sentence25: Is there any other options that we can look into? Sentence26: Shoot. Well, okay, how about two nights? Sentence27: I apologize. There is no hotel or guesthouse in the south with free parking that can accomodate you with those details. A different day or a shorter stay may work. Sentence28: I'm sorry to tell you that there is no hotel in any area of town that meets those requirements and can accomodate 6 for 3 days from Sunday. Sentence29: Are you certain there is not either a guesthouse or hotel in the south with free parking for 2 or 3 nights Sunday for 6 people? Sentence30: I need 6 tickets please. Question: Who has spoken the sentence 22? (A) User (B) System
Output: 


Answer: (A) User