Automation: Sending sms based on button press in alarm

My Problem:

I want to get a reminder or an alarm every sunday and tuesday evening that gives me the chance to press two buttons: one that sends an sms to another person with content x and another button with to send the sms with content y.

I thought about something like this:

Displayed:

IF (Sunday 19:00 or Tuesday 19:00)


*Show me A Screen (sth. like an alarm) with two buttons


IF (Button x)


Send SMS (or better telegram or whatsapp or messenger) with content x to recipient a


ELSE


Send SMS with content y to recipient a

i already looked into IFTTT but it doesnt do the thing with the button-decision afaik.

Thanks for any help.