Actually I want to send an email to my client after weekend. So I am confused that is it formal to say "Hope you had a nice weekend". I want to write an email in professional way because I can't lose my client.
How I start my email which convinced him to stay in-touch with me. Any help would be appreciated?
Edited:
Actually the client which I have mentioned above is an expert of company. I am working on their open-source product and I got some issue.
On this issue our discussion was continued and after weekend I am afraid that may he will not reply to my question because I wasn't answered to his questions though I have more responsibility because the problem is mine and he is just help me out.
May he felt aggressive upon not getting any response and close the discussion. If this happen first of all I can't get any further knowledge or information from him (Who is expert and experienced person) and secondly It's very difficult for me to solve this problem.