Trigger for reply to request

Trigger for reply to request

Hi,
How to define a custom trigger just when technician reply to request? I want to run a script and call another API with technician's reply data. As matter of fact, I want to give technician's reply and send to another Message Instance like Whats App, etc.

SDP v13.0.08
DB: MS SQL

What should I do? Do you have any solution?

Thanks for helping

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