It was a pity that I didn't get to say Goodbye to you when I left. Hope you have had a nice return home.

 It was very nice to meet you in the conference and thank you for your hospitality and the Arabic lesson.

I am traveling in Egypt now. I will talk to you about the potential collaborative work when I get back to Australia .

 I look forward to seeing you again in the near future.

Thanks and regards,

 Qing Li