system
anxious: I am about to embark on a three month trip. I am having second thoughts about it.
gpt
I am having second thoughts about my three month long trip.
gpt
That's a long time to be away. Are you going by yourself?
gpt
I am. I have never gone away that long.
gpt
The opportunity probably won't come along to many times in a lifetime. You should take advantage of it and enjoy yourself as much as you can.