How to reply to invitation messages

See if you want to go. If you want to go, the reply is simple, congratulations to each other and arrive on time on the wedding day; If you don't want to go, congratulate first, then apologize and explain why you can't go (business trip is a reasonable reason). But when someone invites you, you reply to a text message, which shows that you already know that it is inappropriate not to give a gift at this time. So as long as you reply to the text message, whether you go or not, the gift will definitely be delivered. If you want to know the specific wording of the news, don't ask here, right?