Can the system send my customer their ticket and hotel voucher by email with my own logo on it?

Yes, the confirmation emails and the travel documents go out under your own brand, not under the name of any technology provider.

Once a booking is paid and confirmed, the system builds the documents your traveller needs and emails them automatically. That normally means a booking confirmation, the flight ticket details with the airline reference, and a hotel voucher the guest can show at check in. Your logo, your agency name, your contact details and your terms sit on those documents, and the email itself is sent so that a reply comes back to your own inbox. Most agencies also set the wording of the covering email once, so every customer gets the same message without anyone typing it.

There are a couple of honest limits. The layout you can change is usually the branded parts, the header, the footer, the colours and the text you add, while the booking details themselves are printed the way the supplier or the airline sends them, because that is what the hotel or the airport staff will check against. Some suppliers also send their own confirmation directly to the guest, and you cannot always stop that. Whether the emails leave from your own domain name depends on a small setup step on your side so that your mail is trusted and does not land in a junk folder.

When you are ready, make one test booking and send the documents to your own address, so you can see exactly what your customer will receive before a real traveller does.