I look forward to Ving 我期待……
例:I look forward to discussing this matter in person with you soon.
我期待很快能與你親自討論此事。
If you have any questions, please don't hesitate to...
例:If you have any questions, please don't hesitate to call me.
假如你還有什麼疑問,請不要猶豫打電話給我。