Accents are an enriching part of our linguistically and culturally diverse population. 
Accent modification is an elective service that clients may wish to undertake to change or modify their speech patterns. Accents of all diverse linguistic backgrounds should be celebrated. They often serve as a source of pride for individuals and frequently reflect the social, cultural, ethnic, and geographic background of a person; we all sound different to one another. However, there are times when speaking with a strong accent may impede effective and efficient communication. This can affect school, university, the work place, interviews and social interactions. Because of this, you may elect to modify your accent. Some issues that may arise and that may warrant individuals to seek elective Speech Pathology services are:
⦁    difficulty being understood
⦁    frequent need to repeat oneself
⦁    attention being directed more toward the accent than the message
This service may suit:
⦁    People who speak English as a second language
⦁    People who want to change their regional accent
⦁    Professionals who want to communicate better at work
⦁    Actors who need to learn a new accent for a role.
Accents, whether they are regional or from another country are a natural part of spoken language. It is important to recognise that no accent is "better" than another (American Speech and Hearing Association (ASHA) 2020). 
For further information, please visit Speech Pathology Australia; American Hearing and Speech Association or Royal College of Speech and Language Therapists.
Two clinical papers are listed below for further reading. 
Brady, K. W., Duewer, N., & King, A. M. (2016). The effectiveness of a multimodal vowel-targeted intervention in accent modification.Contemporary Issues in Communication Science and Disorders, 43, 23–34.
Carlson, H. K., & McHenry, M. A. (2006). Effect of accent and dialect on employability. Journal of Employment Counseling, 43 (2), 70–83.