Create a reminder email a specific time before a date and time occurs

Hi there,

I tell you, I use a reservation system called Amelia, from which I can obtain the date and time in which the reservation is made, through HTTPs, as a field/parameter with the value being the date and time of the reserve

What I would like to achieve would be to send a reminder email when there is 1 day or a few hours left before the meeting starts.

I have found the “Delay” module, but I don’t know if this is enough or how I could get it

Please could you help me?

Thank you so much