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 sounds great. Can you book a room for me? Sentence2: I will get there thursday and stay for 2 nights. I am the only guest staying. Sentence3: Sure, i can help you with that. What day will you arrive and for how many days will you be staying? Sentence4: Is a 1 night stay available? Sentence5: Ok can you book it for me with a confirm number Sentence6: That will be all. Thanks. Sentence7: Yes please, for 1 person, 2 nights starting Thursday. Sentence8: How about a 17:21 that will arrive by 18:10? Sentence9: You're welcome and enjoy your stay. Sentence10: Your booking at express by holiday inn cambridge was successful for 3 days 2 nights arriving in Thursday for a party of 1. Would you like your reference number? Sentence11: I would recommend Express by Holiday Inn Cambridge on the east side. Sentence12: Booking was successful, the total fee is 10.24 GBP payable at the station . Reference number is : MQ8762HX Sentence13: Reference number is : 9ZTP686K . Do you require any further assistance? Sentence14: Would you like me to book the room for you? Sentence15: I need the reference number to confirm my booking at the hotel. You should've provided that to me. Sentence16: I need a train to stevenage on saturday. Sentence17: Great, can you help me find an expensive 2 star hotel that has free wifi? Sentence18: Much later, I can't leave any earlier than 16:15. Sentence19: Unfortunately, this will not let me book at this time. Sentence20: The earliest train on Saturday leaves at 5:21. When would you like to depart? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System