Question

a stranger has helped your grandfather and you want to appreciate him for the help extended by him. write any three lines to thank him

Answer 1

thankyou so much for helping to my grandfather.
now its my turn to help you when you need that
so giveme your contact number and remember me when you need.

Answer 2

If any stranger has helped my grandfather then first of all i would thank him/her whatever he/she has done for my grandfather.

Then i would ask him/her for personal contact number.

I would ask the name of that person .

I would invite the person in our house .

And finally i assure him/her, if someday he/she will need some help, he/she will definitely ask me about that .