看一下下面这封信，写一封回信，要强调我一定要cancel并且我是online课程不是线下课，也就是我并没有airline ticket以及其他具体信息可以提供。

Dear [Your Name], Thank you for your email regarding your request to cancel the language program and receive a refund. We apologize for any inconvenience caused by the delay in our response. We understand that you are an online student and do not have an airline ticket or other specific information to provide. However, we would like to remind you that cancellation policies may vary depending on the program and the terms and conditions agreed upon at the time of enrollment. If you are certain that you wish to cancel the program, please let us know and we will do our best to assist you. Please note that refunds may not be available in all cases, and any applicable fees or charges may be deducted from the refund amount. We appreciate your understanding and cooperation in this matter. If you have any further questions or concerns, please do not hesitate to contact us. Best regards, [Name]