Dear yaqubeee,
Hope my email finds you in good health. Regarding your project, I offer my services to complete the assigned task of entering all the data in a short span. I am proposing 7 days as a cautious figure, but I can give you a better estimate once I know the volume of all the data. I do not demand any initial milestone percentage, and would only talk about it once the task is completed. My bid is also competitive, and with the quality of work that I propose, it will make for an attractive offer. I am happy to show a demonstration or a mock-up of any sort upon demand.
Looking forward to hearing from you,
Best,
Blackbird