第一句：Have a nive trip!
A: Next week I'm going to Hawail for my holiday.
B: Have a nice trip!
A: I'll visit Disneyland with my wife and children a couple of days later.
B: I hear that there are often a lot of people there at this time of year.
A: Oh, really? I hope there are not too many people then.
B: Good luck!
Have a good trip!/Have a good journey! 旅途愉快！
May you have a wonderful journey! 祝您旅途愉快！
And a safe landing! 祝您平安到达！