Can I get a refund if I go to Thailand with a group?

Tickets can't be refunded once they are opened. There is also the travel agency's air tickets are generally buy-out tickets. If you don't go temporarily a few days before the trip, even if you don't have a ticket, the travel agency won't give you a refund, because it's very likely that you won't receive anyone. Because travel agencies have to pay airlines whether they go or not. The travel agency won't issue the ticket unless you tell him you won't leave early. There is enough time to take your place again.