I have signed the job offer previously and the company has agreed on my proposed onboard date. However, the company reached out to me and asked if I can start earlier after a couple of weeks due to tight human capital demand.
Personally I'm not willing to do so as I'm relocating to a new city and have some personal things to do. Should I provide specific and concrete detials to reject starting earlier? Or, is it reasonable if I propose onboarding according to the original schedule without giving specific reasons? Thanks.