Is it correct to join two complete sentences with a comma without coordinating conjunction?

1) If, for whatever reason, you don’t think the quoted price is legitimate, please kindly inform us of your target price. Our sales teams would be glad to work around your budget.
2) If, for whatever reason, you don’t think the quoted price is legitimate, please kindly inform us of your target price, our sales teams would be glad to work around your budget.

Please kindly advise on the use of comma in the above two sentences. Any help appreciated.