A friend has asked you to babysit on Saturday and wants to know how much you charge per hour for this. Unfortunately, you already have a commitment this weekend and cannot help. However, you are free the following weekend.
Sample Answer
Dear Bella,
Hope you are doing fine and enjoying the season. I am so happy that you asked me to babysit Anna for you. She is such an adorable child and I love spending time with her. I would be happy to babysit her for you but due to my exam at the university the next Monday, I am afraid I cannot spare time on Saturday. However, I will be free the next week and would be happy to look after her if you want.
I will be horribly busy studying this whole week and during the weekends as I have an important exam next Monday. My term final result will depend on this exam and I have to dedicate my time to prepare for it. I hope you understand that I cannot spare time before my exam even after I wish I could. However, I will be free the next weekend and would like to babysit for you in case you go out then.
As I remember, I charged you 20 dollars an hour last time and the charge would be the same this time as well. In case you need my service for more than 8 hours a day, you should inform beforehand.
With lots of love.
Yours truly,
Emma