The sentence 'if I can be of any help' is correct and can be used in written English. You can use this sentence when you are offering assistance to someone. For example: "If I can be of any help, please don't hesitate to ask.".
If I can be of any help on the rest of your tour, don't hesitate to email me.
"Y'all have a wonderful day," he calls as we finally edge our way out of the door, adding "Let me know if I can be of any help!" Yes, it's true.
But if I can be of any help connecting people or throwing ideas into the ring, then give me a shout.
If I can be of additional help, don't hesitate to contact me.
I stop and ask if I can be of help.
"First, I feel out if I can be of help, and if they can be comfortable with me.
Mr. Gupta said, "It would be a blessing for me if I can be of help".
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com