It's my pleasure to meet you. Even though we only knew each other for a very short time, you helped me a lot on improving my English. I truely wish you will have a great career and everything goes smooth after returned to United States.
It was nice meeting you. I am grateful that, even in the short period of time I spent with you, I have got your kind help and gained so much from you in English. I wish you great success back in the US, and all the best ahead!
Nice to meet you, although the time is quite short, I appricate for your help and acquire on the English language. I hope you will have a good position better than now, when you back to USA.
It was a pleasure meeting (to meet) you. Although your stay was brief, your kind help and support meant a lot to me as my English profiency has been much improved. I wish everything goes well with you upon your return to the US.
I am so happy to meet you. Although we had quite a short time being together, you helped me a lot to improve my English. Hope you everything goes well and have a bright future after you return to the US!