I need to reply to a customer stating that he will make a visit to the company. Is it correct to say "You are most welcome" or there are other nice words?

Thank you for your help
Is that to say you need to reply to a customer who has written you stating that he wishes to visit the company? No, matter, your reply is just right.
'You are most welcome,' always works. 'We are delighted that you have chosen to visit our company and look forward to having you here.

You might say, 'Please let us know when you wish to visit so that we might make arrangements
to ensure your time and effort are spent effectively.'
We are delighted that you have chosen to visit our company and look forward to having you here.

You might say, 'Please let us know when you wish to visit so that we might make arrangements
to ensure your time and effort are spent effectively.'