How to copy values from worknotes to field when state is on hold and hold reason Awaiting customer

[maheshch18]

Hi Team,

Once user changes the state to on hold and reason is awaiting customer after that we have received the work note as: (Message: Ticket number 123 has been created.)

we need to copy the 123 value to custom field (Ticket number).

Please provide the solution.

Regards,

Mahesh.