I welcome you and your son to come to Thailand, and I will wait for you to come to Thailand. You notice the days to come, because I would have to get you to the airport.
I welcome you and your son to come to the country, Thai, and I will wait for you to come in Thai. You tell them the date and time to come because I'll have to get you to the airport
I welcome you and your son in the country, and I will wait for you to Thailand, you will be notified that day, because I will have to take you to the airport.