You should Think Condition Is King & Show Your Expertise.
Consider using below to help analyze your clients hair condition and also track the improvement in the clients hair after every conditioning session. Incorporate this into every consultation. If you track the progress of your clients condition then you help your client understand and manage their expectation. Its a marathon and not a sprint to optimum hair condition. Make sure your client is aware of this.
Commit to them and get them to commit to beautiful hair. Good Luck