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: thank you for helping Sentence2: I also need a taxi from my room to the restaurants by the time of my reservation. Sentence3: Booking was successful. Reference number is : VDQW6MG8 . What else can I do to assist you today? Sentence4: You're most welcome. Can I help you with anything else today? Sentence5: I don't know if you've heard of it but can you please get me some information on the la tasca restaurant? Sentence6: I would like to book the Acorn for 2 people for 5 nights starting Sunday. Sentence7: Great! will you please book that for 2 people at 17:30 on Sunday? Sentence8: Happy to help - la tasca is a Spanish restaurant with a moderate price point located in the centre. Sentence9: I need a place to stay, a hotel in the north. Preferably in the guesthouse category Sentence10: Acorn guest house is available, would you like to stay there? Sentence11: OK, it was a pleasure helping you. Have a great time in Cambridge. Goodbye. Sentence12: No that was everything, thank you! Sentence13: Does that include wifi? I don't want it to be too expensive. Sentence14: Booking is complete. I have you booked with a black Audi. Contact number 07873880008. It will pick you up at 17:15. Is there anything? Sentence15: Alright, the table will be reserved for 15 minutes. Your reference number is: AO0MS4Q3 . Sentence16: It does include wifi. It is moderately priced. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User