Follow-up is your most important tool for success for any face-to-face encounter. Be sure to be specific about what you will do for your customer, and when you will do it.
Use would you mind if + the past simple, do you mind + the present simple or may + infinitive (without to) to ask if something is acceptable or not.
Do you mind if ask you question about your company?
May I stop by your office next week?
Remember, good customer care means taking action to support your words. This builds trust into your customer relationship.