Expressing Goodwill when someone is arriving:
- Welcome
- Welcome back!
- Come in.
- It's good to meet you. (first time only)
- It's good to see you again. (after the first time)
Expressing Goodwill when someone is leaving
- It's been nice talking with you.
- Have a good/nice day.
- Have a nice weekend.
- Have a nice trip.
- Have fun.
- Keep in touch.