A：How do you do,Mr.Smith ? This is Lili.I'm calling to thank you for the wonderful dinner we had yesterday . I enjoyed it very much.
B：You're welcome.I'd like you to join us for dinner again sometime.
A：Thank you,Mr.Smith.I'm returning to China today.
B：Today?
A：Yes.I appreciate all help and in particular,all the time that you've spent on my account during my stay here.
B：Don't mention it.I am pleased to help you.
A：If there's anything that I can help you in the future, please let me know.
B：I'll do that.Thank you.Have a safe trip home.
