Presumably, you ran a survey and got all statistics supporting your points:
A.1. High percentage complaints from clients.
A.2. Bad support causes loss of revenue.
A.3. Senior management is considering whether IT help desk brings value in current form.
Hence, actions have to be taken.
B.1. Staff are technically competent
B.2. Clients explicitly complain about communication skills
B.3. Staff are willing to take communication training
Therefore, training is a good option.
C.1. Other companies taking the training program get excellent results, according to statistics.
C.2. Previous trainees praise the course highly.
C.3. The course can be customized to the needs of this IT help desk team.
C.4. Estimated return is very high, while the cost of the training is a bargain.
Then, taking the training is no-brainer.
A.1. High percentage complaints from clients.
A.2. Bad support causes loss of revenue.
A.3. Senior management is considering whether IT help desk brings value in current form.
Hence, actions have to be taken.
B.1. Staff are technically competent
B.2. Clients explicitly complain about communication skills
B.3. Staff are willing to take communication training
Therefore, training is a good option.
C.1. Other companies taking the training program get excellent results, according to statistics.
C.2. Previous trainees praise the course highly.
C.3. The course can be customized to the needs of this IT help desk team.
C.4. Estimated return is very high, while the cost of the training is a bargain.
Then, taking the training is no-brainer.