Customer Enquiry Form – Contact preferences

Q. Do customers like to have the option to provide a prefered contact time and method when submitting a customer enquiry form?

For example... 'When would you like us to call you back?' & 'How would you like us to contact you'

For - Customers who want to request a design consultation appointment

Who - Want to be contacted at a time which is more convenient to them (i.e morning, afternoon, evening)

On - The online appointment form

That is - Simple, convenient and informative

I've spoken to handful of customers instore, 7 out of 10 preferred to be contact at a time more suitable for them.

Before I present back to the business I'd like to have concrete evidence which supports introducing these extra fields on the online appointment form.

So on that note, what are your thoughts or resources you're aware that can help support what I'm trying to achieve other than best practices and personal opinion.

Thanks Greg