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: Great thank you very much Sentence2: How about el shaddai? It has free parking and wifi and is in the centre of town. Sentence3: You're welcome. Is there anything else I can help you with? Sentence4: Thanks I have everything I need. Goodbye! Sentence5: The contact number is 07263703306. Can I provide any further assistance today? Sentence6: Taxi booking completed! Your car is a Grey Audi, their contact number is 07263703306. Sentence7: There a 5 places in the centre. Do you have a preferred price range? Sentence8: Is there a food type you have a preference for? Spanish, Italian, Chinese, Indian are just some of the choices. Sentence9: I don't need a booking, but I need a taxi commuting between that hotel and the booked restaurant. Sentence10: Great. Thank you for contacting the Cambridge Towninfo Centre Sentence11: I'd like to book a table for 1 at 14:45 on monday, please. I also need the reference number. Sentence12: I have booked the restaurant for you. The table will be reserved for 15 minutes. The reference number is Y3MGYYH6 . Sentence13: I also need a hotel that is near the restaurant. Sentence14: Just the telephone number of the taxi please. Sentence15: Okay, I've got the dojo noddle bar in the centre of town that serves cheap food. How will that be? Sentence16: I would like to eat at cheap restaurant in the centre while I am here in Cambridge. Sentence17: That sounds good. What is it's star rating, please? Sentence18: No, I don't really care what kind of food it is as long as it's cheap. I will need a reservation for 1 person at 14:45 on Monday. Sentence19: No price range. I do need it to have free wifi and parking though. Can you tell me what star that hotel would be? Sentence20: Will the taxi arrive by the booked time? Sentence21: Yes, your taxi will arrive by the booked time of 14:45. Is there anything else I can help you with today? Sentence22: The star rating is 0. Would you still like me to book this hotel for you? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System