Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Is the Express by Holiday Inn cheap? And have a star of 4? Sentence2: Sounds great. Could I also get info on a train for monday? Sentence3: It should depart Cambridge to Peterborough. I need to be there by 21:30. I need reservations for 8. Can I get a reference number please? Sentence4: It is in the expensive price range with a 2 star rating. Sentence5: The only hotel that fits that description is the Express by Holiday Inn Cambridge, but there are also several guesthouses if you are interested. Sentence6: TR9003 will have you there by 7:56. Booking was successful, the total fee is 132 GBP payable at the station . Reference number is : AV90SV4C Sentence7: Thank you for calling. Enjoy your trip. Goodbye. Sentence8: Hm, I would rather stay at a cheap hotel with a 4 star rating. Sentence9: I am looking for a hotel with free parking in east cambridge. Sentence10: I just would like their postcode and phone number and can you tell me whether they have free wifi? Sentence11: Thanks for all of your help today. That is all I need. Bye. Sentence12: Okay! They do have internet. Their postcode is CB58RS, and their phone number is 01223575122. Sentence13: Please give me your departure and destination. And what time do you want to leave at. Sentence14: Autumn House has all your requirements except it not being a Holiday Inn Express. Would you like a booking there? Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System