Will the software send my customer a confirmation email automatically or do I have to send it myself?

Yes, in most setups a confirmation goes out to your customer automatically as soon as a booking is confirmed, so you do not have to sit down and write one every time. The message carries your agency name, your logo and your contact details, so to the traveller it simply looks like an email from you rather than from a system behind the scenes.

You can usually edit the wording of these emails yourself, so the greeting, the booking details shown and the terms at the bottom read the way you want them to. Many agencies also set a copy to come to their own inbox, which is a simple way to keep an eye on what is going out and to keep a record in your own mail. If you would rather check each booking before the traveller hears anything, automatic sending can normally be switched off so your staff send the confirmation by hand instead.

There are honest limits worth knowing. Which emails are included and how much you can change them can depend on your plan, and messages about later changes, such as a cancellation or a schedule change from the airline or hotel, depend on whether the supplier or the API passes that update through in the first place. Delivery also depends on your own email domain being set up properly, otherwise some messages can land in a customer's spam folder.

The sensible next step is to make a test booking, see exactly what your customer receives, and tell us which messages you want switched on, reworded or turned off.