Hi , Doris . I hear you are going to the United States next week .
neutral
user
So I am .
neutral
assistant
When did you get your passport ?
neutral
user
I got it last week .
neutral
assistant
How long is it valid ?
neutral
user
It's valid for 5 years . I am planning to do a doctor ’ s degree during my stay there .
neutral
assistant
Good . Good luck to you !
happiness
user
Thank you very much .
happiness
assistant