the quotation mark  is a special character in a string. If you want to
read a special character as a string  literal then you place a control
character in front of it. In this case the \ character

"and bob said \"Hi how are you?\""

You probably could use ucode or ascii, but you don't need to.

You must use the escape character \" if you want the string  to include
a the quotation mark  character.