Shall you have any problem, please let me know.
如果有任何問題的話請告訴我。
Your comments and suggestions are welcome!
歡迎提供任何建議。
Look forward to having your opinions.
希望能得到你的意見。
I need your advice with…
我需要你對於…的建議。
……,(do you have) any suggestions for me?
…你有什麼建議嗎?