What you have here is direct speech, which means that you have a direct quote of what the person has said.
To make something go from direct to indirect speech, just remove the quotation marks. If you do that, you also need to make sure that all of the verbs and nouns have been changed to accommodate the change.
In this case, simply remove the quotation marks. Where the woman said “I”, you can change to “she”. You also sometimes need to change the verb to fit the situation. If the person said something in the past, they are likely talking about themselves in the present. However, when you change their speech to the past tense as well.
A good way to change this would be something like the following:
- She said that she would come tomorrow.
