Boon Chit read the advertisement and immediately sent the following text message to Boo Lat: "I wish to buy the phone as advertised. If I do not hear from you by tomorrow evening, I shall assume that you have accepted my proposal." Boo Lat did not care to answer Boon Chit. The next two days, Boon Chit went to Boo Lat with the money to purchase the phone. Boo Lat refused to sell the phone to Boon Chit because he has agreed to sell it to Boo Yong. Advise Boon Chit.