You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I can book the curry garden for you. Sentence2: Could you please just give me the postcode and phone number for the Golden curry? Sentence3: I'm still not finding anything. What part of town would you like to look in? Sentence4: There are two hotels I can find, one called the Gonville Hotel which is in the centre. The telephone is 01223366611 and the postcode is CB11LY. Sentence5: I would like to go from the hotel to the restaurant no later than 08:00 Sentence6: I've got a Red Audi, contact number 07611734774 leaving at 08:00. Sentence7: Sure, where will you be traveling to and from? Is there a particular time you'd like to leave or arrive by? Sentence8: Yes, I'd like to eat in the centre if possible. Sentence9: Great! Have a nice trip! Sentence10: I'd like it to be 3 stars and in the same price range as the restaurant. Sentence11: There are 2 curry garden and the golden curry. would you like to book either one? Sentence12: I'm sorry, there are no hotels that meet your needs. Do you have any other criteria? Sentence13: Thanks. Can you help me find a hotel as well? I don't need internet, but I do need free parking. Sentence14: can i get a contact number and car type please? Sentence15: I'm looking for an expensive Indian restaurant. Can you find me one? Sentence16: I would prefer something in the Cambridge area or close to it. Sentence17: That's ok, I just need the postcode and phone number. Sentence18: Sure the phone number is 01223329432 and the postal code is cb12az Sentence19: Thank you, that's everything that I need. Sentence20: There are several what area would you like to eat at? Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User