Mistakes in my diary: Last night, I was chatting with my good friend, Maria...

[Kwfine]

Hi teacher,

I am not sure if there are any grammatical mistakes in the following sentence:
...
Last night, I was chatting with my good friend, Maria, on the phone.
Maria told me that she needs to finish her assignment first, so
she couldn't go shopping with me.

Please help, teachers.

Thank you

kitty

[Cerberus™]